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Finding the Fourth Proportional to 688,501.50, 950,221.17 and 386,695.50

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Solution

The fourth proportional to 688,501.50, 950,221.17 and 386,695.50 is: 533,689.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,501.50 : 950,221.17 = 386,695.50 : x
  2. Step 2: Convert to fraction form
    688,501.50/950,221.17 = 386,695.50/x
  3. Step 3: Cross multiply
    688,501.50x = 950,221.17 × 386,695.50
  4. Step 4: Simplify right side
    688,501.50x = 367,446,250,443.74
  5. Step 5: Solve for x
    x = 367,446,250,443.74/688,501.50
  6. Step 6: Final answer
    x = 533,689.83

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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.