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Finding the Fourth Proportional to 664,996.38, 917,700.83 and 378,534.88

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Solution

The fourth proportional to 664,996.38, 917,700.83 and 378,534.88 is: 522,381.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,996.38 : 917,700.83 = 378,534.88 : x
  2. Step 2: Convert to fraction form
    664,996.38/917,700.83 = 378,534.88/x
  3. Step 3: Cross multiply
    664,996.38x = 917,700.83 × 378,534.88
  4. Step 4: Simplify right side
    664,996.38x = 347,381,773,559.95
  5. Step 5: Solve for x
    x = 347,381,773,559.95/664,996.38
  6. Step 6: Final answer
    x = 522,381.45

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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.