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Finding the Fourth Proportional to 502,421.73, 693,380.57 and 287,629.17

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Solution

The fourth proportional to 502,421.73, 693,380.57 and 287,629.17 is: 396,950.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,421.73 : 693,380.57 = 287,629.17 : x
  2. Step 2: Convert to fraction form
    502,421.73/693,380.57 = 287,629.17/x
  3. Step 3: Cross multiply
    502,421.73x = 693,380.57 × 287,629.17
  4. Step 4: Simplify right side
    502,421.73x = 199,436,476,405.08
  5. Step 5: Solve for x
    x = 199,436,476,405.08/502,421.73
  6. Step 6: Final answer
    x = 396,950.34

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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.