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Finding the Fourth Proportional to 486,415.40, 729,623.10 and 131,484.20

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Solution

The fourth proportional to 486,415.40, 729,623.10 and 131,484.20 is: 197,226.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,415.40 : 729,623.10 = 131,484.20 : x
  2. Step 2: Convert to fraction form
    486,415.40/729,623.10 = 131,484.20/x
  3. Step 3: Cross multiply
    486,415.40x = 729,623.10 × 131,484.20
  4. Step 4: Simplify right side
    486,415.40x = 95,933,909,605.02
  5. Step 5: Solve for x
    x = 95,933,909,605.02/486,415.40
  6. Step 6: Final answer
    x = 197,226.30

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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.