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Finding the Fourth Proportional to 734.68, 1,012.80 and 559.72

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Solution

The fourth proportional to 734.68, 1,012.80 and 559.72 is: 771.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.68 : 1,012.80 = 559.72 : x
  2. Step 2: Convert to fraction form
    734.68/1,012.80 = 559.72/x
  3. Step 3: Cross multiply
    734.68x = 1,012.80 × 559.72
  4. Step 4: Simplify right side
    734.68x = 566,884.42
  5. Step 5: Solve for x
    x = 566,884.42/734.68
  6. Step 6: Final answer
    x = 771.61

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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.