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Finding the Fourth Proportional to 710.50, 1,066.20 and 325.76

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Solution

The fourth proportional to 710.50, 1,066.20 and 325.76 is: 488.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.50 : 1,066.20 = 325.76 : x
  2. Step 2: Convert to fraction form
    710.50/1,066.20 = 325.76/x
  3. Step 3: Cross multiply
    710.50x = 1,066.20 × 325.76
  4. Step 4: Simplify right side
    710.50x = 347,325.31
  5. Step 5: Solve for x
    x = 347,325.31/710.50
  6. Step 6: Final answer
    x = 488.85

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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.