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Finding the Fourth Proportional to 387,536.80, 534,814.32 and 217,767.52

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Solution

The fourth proportional to 387,536.80, 534,814.32 and 217,767.52 is: 300,526.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,536.80 : 534,814.32 = 217,767.52 : x
  2. Step 2: Convert to fraction form
    387,536.80/534,814.32 = 217,767.52/x
  3. Step 3: Cross multiply
    387,536.80x = 534,814.32 × 217,767.52
  4. Step 4: Simplify right side
    387,536.80x = 116,465,188,126.89
  5. Step 5: Solve for x
    x = 116,465,188,126.89/387,536.80
  6. Step 6: Final answer
    x = 300,526.78

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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.