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Finding the Fourth Proportional to 714.28, 1,068.72 and 471.10

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Solution

The fourth proportional to 714.28, 1,068.72 and 471.10 is: 704.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.28 : 1,068.72 = 471.10 : x
  2. Step 2: Convert to fraction form
    714.28/1,068.72 = 471.10/x
  3. Step 3: Cross multiply
    714.28x = 1,068.72 × 471.10
  4. Step 4: Simplify right side
    714.28x = 503,473.99
  5. Step 5: Solve for x
    x = 503,473.99/714.28
  6. Step 6: Final answer
    x = 704.87

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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.