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Finding the Fourth Proportional to 712.62, 1,068.73 and 452.23

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Solution

The fourth proportional to 712.62, 1,068.73 and 452.23 is: 678.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.62 : 1,068.73 = 452.23 : x
  2. Step 2: Convert to fraction form
    712.62/1,068.73 = 452.23/x
  3. Step 3: Cross multiply
    712.62x = 1,068.73 × 452.23
  4. Step 4: Simplify right side
    712.62x = 483,307.97
  5. Step 5: Solve for x
    x = 483,307.97/712.62
  6. Step 6: Final answer
    x = 678.21

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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.