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Finding the Fourth Proportional to 664,115.16, 916,479 and 377,652.78

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Solution

The fourth proportional to 664,115.16, 916,479 and 377,652.78 is: 521,160.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,115.16 : 916,479 = 377,652.78 : x
  2. Step 2: Convert to fraction form
    664,115.16/916,479 = 377,652.78/x
  3. Step 3: Cross multiply
    664,115.16x = 916,479 × 377,652.78
  4. Step 4: Simplify right side
    664,115.16x = 346,110,842,161.62
  5. Step 5: Solve for x
    x = 346,110,842,161.62/664,115.16
  6. Step 6: Final answer
    x = 521,160.88

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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.