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Finding the Fourth Proportional to 713.16, 983.88 and 418.32

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Solution

The fourth proportional to 713.16, 983.88 and 418.32 is: 577.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.16 : 983.88 = 418.32 : x
  2. Step 2: Convert to fraction form
    713.16/983.88 = 418.32/x
  3. Step 3: Cross multiply
    713.16x = 983.88 × 418.32
  4. Step 4: Simplify right side
    713.16x = 411,576.68
  5. Step 5: Solve for x
    x = 411,576.68/713.16
  6. Step 6: Final answer
    x = 577.12

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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.