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Finding the Fourth Proportional to 387,500.52, 534,798.54 and 217,731

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Solution

The fourth proportional to 387,500.52, 534,798.54 and 217,731 is: 300,495.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,500.52 : 534,798.54 = 217,731 : x
  2. Step 2: Convert to fraction form
    387,500.52/534,798.54 = 217,731/x
  3. Step 3: Cross multiply
    387,500.52x = 534,798.54 × 217,731
  4. Step 4: Simplify right side
    387,500.52x = 116,442,220,912.74
  5. Step 5: Solve for x
    x = 116,442,220,912.74/387,500.52
  6. Step 6: Final answer
    x = 300,495.65

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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.