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Finding the Fourth Proportional to 713.25, 1,068.70 and 653.47

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Solution

The fourth proportional to 713.25, 1,068.70 and 653.47 is: 979.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.25 : 1,068.70 = 653.47 : x
  2. Step 2: Convert to fraction form
    713.25/1,068.70 = 653.47/x
  3. Step 3: Cross multiply
    713.25x = 1,068.70 × 653.47
  4. Step 4: Simplify right side
    713.25x = 698,359.08
  5. Step 5: Solve for x
    x = 698,359.08/713.25
  6. Step 6: Final answer
    x = 979.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.