Home / 643,662,000.20-965,493,000.30-158,987,808.20

Finding the Fourth Proportional to 643,662,000.20, 965,493,000.30 and 158,987,808.20

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Solution

The fourth proportional to 643,662,000.20, 965,493,000.30 and 158,987,808.20 is: 238,481,712.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,662,000.20 : 965,493,000.30 = 158,987,808.20 : x
  2. Step 2: Convert to fraction form
    643,662,000.20/965,493,000.30 = 158,987,808.20/x
  3. Step 3: Cross multiply
    643,662,000.20x = 965,493,000.30 × 158,987,808.20
  4. Step 4: Simplify right side
    643,662,000.20x = 153,501,615,950,138,912
  5. Step 5: Solve for x
    x = 153,501,615,950,138,912/643,662,000.20
  6. Step 6: Final answer
    x = 238,481,712.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.