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Finding the Fourth Proportional to 714.48, 1,070.18 and 343.72

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Solution

The fourth proportional to 714.48, 1,070.18 and 343.72 is: 514.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.48 : 1,070.18 = 343.72 : x
  2. Step 2: Convert to fraction form
    714.48/1,070.18 = 343.72/x
  3. Step 3: Cross multiply
    714.48x = 1,070.18 × 343.72
  4. Step 4: Simplify right side
    714.48x = 367,839.64
  5. Step 5: Solve for x
    x = 367,839.64/714.48
  6. Step 6: Final answer
    x = 514.83

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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.