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Finding the Fourth Proportional to 712.47, 1,068.71 and 347.29

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Solution

The fourth proportional to 712.47, 1,068.71 and 347.29 is: 520.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.47 : 1,068.71 = 347.29 : x
  2. Step 2: Convert to fraction form
    712.47/1,068.71 = 347.29/x
  3. Step 3: Cross multiply
    712.47x = 1,068.71 × 347.29
  4. Step 4: Simplify right side
    712.47x = 371,152.30
  5. Step 5: Solve for x
    x = 371,152.30/712.47
  6. Step 6: Final answer
    x = 520.94

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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.