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Finding the Fourth Proportional to 710.76, 1,063.60 and 515.96

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Solution

The fourth proportional to 710.76, 1,063.60 and 515.96 is: 772.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.76 : 1,063.60 = 515.96 : x
  2. Step 2: Convert to fraction form
    710.76/1,063.60 = 515.96/x
  3. Step 3: Cross multiply
    710.76x = 1,063.60 × 515.96
  4. Step 4: Simplify right side
    710.76x = 548,775.06
  5. Step 5: Solve for x
    x = 548,775.06/710.76
  6. Step 6: Final answer
    x = 772.10

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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.