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Finding the Fourth Proportional to 733.28, 1,011.28 and 471.20

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Solution

The fourth proportional to 733.28, 1,011.28 and 471.20 is: 649.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    733.28 : 1,011.28 = 471.20 : x
  2. Step 2: Convert to fraction form
    733.28/1,011.28 = 471.20/x
  3. Step 3: Cross multiply
    733.28x = 1,011.28 × 471.20
  4. Step 4: Simplify right side
    733.28x = 476,515.14
  5. Step 5: Solve for x
    x = 476,515.14/733.28
  6. Step 6: Final answer
    x = 649.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.