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Finding the Fourth Proportional to 387,747.68, 535,086.52 and 215,663.98

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Solution

The fourth proportional to 387,747.68, 535,086.52 and 215,663.98 is: 297,613.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,747.68 : 535,086.52 = 215,663.98 : x
  2. Step 2: Convert to fraction form
    387,747.68/535,086.52 = 215,663.98/x
  3. Step 3: Cross multiply
    387,747.68x = 535,086.52 × 215,663.98
  4. Step 4: Simplify right side
    387,747.68x = 115,398,888,547.55
  5. Step 5: Solve for x
    x = 115,398,888,547.55/387,747.68
  6. Step 6: Final answer
    x = 297,613.36

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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.