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Finding the Fourth Proportional to 713.52, 1,070.28 and 470.21

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Solution

The fourth proportional to 713.52, 1,070.28 and 470.21 is: 705.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.52 : 1,070.28 = 470.21 : x
  2. Step 2: Convert to fraction form
    713.52/1,070.28 = 470.21/x
  3. Step 3: Cross multiply
    713.52x = 1,070.28 × 470.21
  4. Step 4: Simplify right side
    713.52x = 503,251.01
  5. Step 5: Solve for x
    x = 503,251.01/713.52
  6. Step 6: Final answer
    x = 705.31

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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.