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Finding the Fourth Proportional to 418,585.86, 576,672.21 and 291,040.02

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Solution

The fourth proportional to 418,585.86, 576,672.21 and 291,040.02 is: 400,956.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,585.86 : 576,672.21 = 291,040.02 : x
  2. Step 2: Convert to fraction form
    418,585.86/576,672.21 = 291,040.02/x
  3. Step 3: Cross multiply
    418,585.86x = 576,672.21 × 291,040.02
  4. Step 4: Simplify right side
    418,585.86x = 167,834,691,531.84
  5. Step 5: Solve for x
    x = 167,834,691,531.84/418,585.86
  6. Step 6: Final answer
    x = 400,956.43

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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.