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Finding the Fourth Proportional to 708.55, 1,061.69 and 476.57

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Solution

The fourth proportional to 708.55, 1,061.69 and 476.57 is: 714.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.55 : 1,061.69 = 476.57 : x
  2. Step 2: Convert to fraction form
    708.55/1,061.69 = 476.57/x
  3. Step 3: Cross multiply
    708.55x = 1,061.69 × 476.57
  4. Step 4: Simplify right side
    708.55x = 505,969.87
  5. Step 5: Solve for x
    x = 505,969.87/708.55
  6. Step 6: Final answer
    x = 714.09

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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.