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Finding the Fourth Proportional to 716,882.72, 989,260.52 and 394,531.21

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Solution

The fourth proportional to 716,882.72, 989,260.52 and 394,531.21 is: 544,432.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,882.72 : 989,260.52 = 394,531.21 : x
  2. Step 2: Convert to fraction form
    716,882.72/989,260.52 = 394,531.21/x
  3. Step 3: Cross multiply
    716,882.72x = 989,260.52 × 394,531.21
  4. Step 4: Simplify right side
    716,882.72x = 390,294,145,515.02
  5. Step 5: Solve for x
    x = 390,294,145,515.02/716,882.72
  6. Step 6: Final answer
    x = 544,432.35

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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.