Home / 769,655.40-1,154,483.10-486,220.20

Finding the Fourth Proportional to 769,655.40, 1,154,483.10 and 486,220.20

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Solution

The fourth proportional to 769,655.40, 1,154,483.10 and 486,220.20 is: 729,330.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,655.40 : 1,154,483.10 = 486,220.20 : x
  2. Step 2: Convert to fraction form
    769,655.40/1,154,483.10 = 486,220.20/x
  3. Step 3: Cross multiply
    769,655.40x = 1,154,483.10 × 486,220.20
  4. Step 4: Simplify right side
    769,655.40x = 561,333,003,778.62
  5. Step 5: Solve for x
    x = 561,333,003,778.62/769,655.40
  6. Step 6: Final answer
    x = 729,330.30

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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.