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Finding the Fourth Proportional to 387,476.69, 534,697.27 and 217,699.88

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Solution

The fourth proportional to 387,476.69, 534,697.27 and 217,699.88 is: 300,414.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,476.69 : 534,697.27 = 217,699.88 : x
  2. Step 2: Convert to fraction form
    387,476.69/534,697.27 = 217,699.88/x
  3. Step 3: Cross multiply
    387,476.69x = 534,697.27 × 217,699.88
  4. Step 4: Simplify right side
    387,476.69x = 116,403,528,297.59
  5. Step 5: Solve for x
    x = 116,403,528,297.59/387,476.69
  6. Step 6: Final answer
    x = 300,414.28

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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.