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Finding the Fourth Proportional to 502,407.20, 753,610.80 and 128,410.40

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Solution

The fourth proportional to 502,407.20, 753,610.80 and 128,410.40 is: 192,615.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,407.20 : 753,610.80 = 128,410.40 : x
  2. Step 2: Convert to fraction form
    502,407.20/753,610.80 = 128,410.40/x
  3. Step 3: Cross multiply
    502,407.20x = 753,610.80 × 128,410.40
  4. Step 4: Simplify right side
    502,407.20x = 96,771,464,272.32
  5. Step 5: Solve for x
    x = 96,771,464,272.32/502,407.20
  6. Step 6: Final answer
    x = 192,615.60

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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.