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Finding the Fourth Proportional to 733.64, 1,010.72 and 512.20

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Solution

The fourth proportional to 733.64, 1,010.72 and 512.20 is: 705.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    733.64 : 1,010.72 = 512.20 : x
  2. Step 2: Convert to fraction form
    733.64/1,010.72 = 512.20/x
  3. Step 3: Cross multiply
    733.64x = 1,010.72 × 512.20
  4. Step 4: Simplify right side
    733.64x = 517,690.78
  5. Step 5: Solve for x
    x = 517,690.78/733.64
  6. Step 6: Final answer
    x = 705.65

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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.