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Finding the Fourth Proportional to 716,464.48, 988,720.95 and 394,167.65

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Solution

The fourth proportional to 716,464.48, 988,720.95 and 394,167.65 is: 543,951.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,464.48 : 988,720.95 = 394,167.65 : x
  2. Step 2: Convert to fraction form
    716,464.48/988,720.95 = 394,167.65/x
  3. Step 3: Cross multiply
    716,464.48x = 988,720.95 × 394,167.65
  4. Step 4: Simplify right side
    716,464.48x = 389,721,815,968.44
  5. Step 5: Solve for x
    x = 389,721,815,968.44/716,464.48
  6. Step 6: Final answer
    x = 543,951.34

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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.