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Finding the Fourth Proportional to 487.26, 726.89 and 470.79

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Solution

The fourth proportional to 487.26, 726.89 and 470.79 is: 702.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.26 : 726.89 = 470.79 : x
  2. Step 2: Convert to fraction form
    487.26/726.89 = 470.79/x
  3. Step 3: Cross multiply
    487.26x = 726.89 × 470.79
  4. Step 4: Simplify right side
    487.26x = 342,210.19
  5. Step 5: Solve for x
    x = 342,210.19/487.26
  6. Step 6: Final answer
    x = 702.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.