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Finding the Fourth Proportional to 710.28, 980.52 and 615.39

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Solution

The fourth proportional to 710.28, 980.52 and 615.39 is: 849.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.28 : 980.52 = 615.39 : x
  2. Step 2: Convert to fraction form
    710.28/980.52 = 615.39/x
  3. Step 3: Cross multiply
    710.28x = 980.52 × 615.39
  4. Step 4: Simplify right side
    710.28x = 603,402.20
  5. Step 5: Solve for x
    x = 603,402.20/710.28
  6. Step 6: Final answer
    x = 849.53

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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.