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Finding the Fourth Proportional to 714.52, 983.66 and 615.72

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Solution

The fourth proportional to 714.52, 983.66 and 615.72 is: 847.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.52 : 983.66 = 615.72 : x
  2. Step 2: Convert to fraction form
    714.52/983.66 = 615.72/x
  3. Step 3: Cross multiply
    714.52x = 983.66 × 615.72
  4. Step 4: Simplify right side
    714.52x = 605,659.14
  5. Step 5: Solve for x
    x = 605,659.14/714.52
  6. Step 6: Final answer
    x = 847.64

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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.