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Finding the Fourth Proportional to 387,313.14, 534,593.64 and 217,601.94

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Solution

The fourth proportional to 387,313.14, 534,593.64 and 217,601.94 is: 300,347.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,313.14 : 534,593.64 = 217,601.94 : x
  2. Step 2: Convert to fraction form
    387,313.14/534,593.64 = 217,601.94/x
  3. Step 3: Cross multiply
    387,313.14x = 534,593.64 × 217,601.94
  4. Step 4: Simplify right side
    387,313.14x = 116,328,613,175.66
  5. Step 5: Solve for x
    x = 116,328,613,175.66/387,313.14
  6. Step 6: Final answer
    x = 300,347.71

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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.