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Finding the Fourth Proportional to 688,432, 950,125.26 and 386,626

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Solution

The fourth proportional to 688,432, 950,125.26 and 386,626 is: 533,593.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,432 : 950,125.26 = 386,626 : x
  2. Step 2: Convert to fraction form
    688,432/950,125.26 = 386,626/x
  3. Step 3: Cross multiply
    688,432x = 950,125.26 × 386,626
  4. Step 4: Simplify right side
    688,432x = 367,343,128,772.76
  5. Step 5: Solve for x
    x = 367,343,128,772.76/688,432
  6. Step 6: Final answer
    x = 533,593.92

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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.