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Finding the Fourth Proportional to 502,391.71, 693,104.20 and 287,416.63

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Solution

The fourth proportional to 502,391.71, 693,104.20 and 287,416.63 is: 396,522.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,391.71 : 693,104.20 = 287,416.63 : x
  2. Step 2: Convert to fraction form
    502,391.71/693,104.20 = 287,416.63/x
  3. Step 3: Cross multiply
    502,391.71x = 693,104.20 × 287,416.63
  4. Step 4: Simplify right side
    502,391.71x = 199,209,673,402.85
  5. Step 5: Solve for x
    x = 199,209,673,402.85/502,391.71
  6. Step 6: Final answer
    x = 396,522.61

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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.