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Finding the Fourth Proportional to 663,581.42, 915,741.82 and 361,775.42

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Solution

The fourth proportional to 663,581.42, 915,741.82 and 361,775.42 is: 499,249.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,581.42 : 915,741.82 = 361,775.42 : x
  2. Step 2: Convert to fraction form
    663,581.42/915,741.82 = 361,775.42/x
  3. Step 3: Cross multiply
    663,581.42x = 915,741.82 × 361,775.42
  4. Step 4: Simplify right side
    663,581.42x = 331,292,881,542.06
  5. Step 5: Solve for x
    x = 331,292,881,542.06/663,581.42
  6. Step 6: Final answer
    x = 499,249.79

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Double scale
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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.