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Finding the Fourth Proportional to 688,431, 950,123.88 and 386,625

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Solution

The fourth proportional to 688,431, 950,123.88 and 386,625 is: 533,592.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,431 : 950,123.88 = 386,625 : x
  2. Step 2: Convert to fraction form
    688,431/950,123.88 = 386,625/x
  3. Step 3: Cross multiply
    688,431x = 950,123.88 × 386,625
  4. Step 4: Simplify right side
    688,431x = 367,341,645,105
  5. Step 5: Solve for x
    x = 367,341,645,105/688,431
  6. Step 6: Final answer
    x = 533,592.54

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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.