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Finding the Fourth Proportional to 708.70, 1,063.05 and 514.30

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Solution

The fourth proportional to 708.70, 1,063.05 and 514.30 is: 771.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.70 : 1,063.05 = 514.30 : x
  2. Step 2: Convert to fraction form
    708.70/1,063.05 = 514.30/x
  3. Step 3: Cross multiply
    708.70x = 1,063.05 × 514.30
  4. Step 4: Simplify right side
    708.70x = 546,726.62
  5. Step 5: Solve for x
    x = 546,726.62/708.70
  6. Step 6: Final answer
    x = 771.45

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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.