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Finding the Fourth Proportional to 508,905.40, 763,358.10 and 134,928.40

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Solution

The fourth proportional to 508,905.40, 763,358.10 and 134,928.40 is: 202,392.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,905.40 : 763,358.10 = 134,928.40 : x
  2. Step 2: Convert to fraction form
    508,905.40/763,358.10 = 134,928.40/x
  3. Step 3: Cross multiply
    508,905.40x = 763,358.10 × 134,928.40
  4. Step 4: Simplify right side
    508,905.40x = 102,998,687,060.04
  5. Step 5: Solve for x
    x = 102,998,687,060.04/508,905.40
  6. Step 6: Final answer
    x = 202,392.60

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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.