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Finding the Fourth Proportional to 513,484.92, 708,641.88 and 287,130.36

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Solution

The fourth proportional to 513,484.92, 708,641.88 and 287,130.36 is: 396,258.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,484.92 : 708,641.88 = 287,130.36 : x
  2. Step 2: Convert to fraction form
    513,484.92/708,641.88 = 287,130.36/x
  3. Step 3: Cross multiply
    513,484.92x = 708,641.88 × 287,130.36
  4. Step 4: Simplify right side
    513,484.92x = 203,472,598,115.48
  5. Step 5: Solve for x
    x = 203,472,598,115.48/513,484.92
  6. Step 6: Final answer
    x = 396,258.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.