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Finding the Fourth Proportional to 1,520.67, 2,279.51 and 740.64

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Solution

The fourth proportional to 1,520.67, 2,279.51 and 740.64 is: 1,110.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.67 : 2,279.51 = 740.64 : x
  2. Step 2: Convert to fraction form
    1,520.67/2,279.51 = 740.64/x
  3. Step 3: Cross multiply
    1,520.67x = 2,279.51 × 740.64
  4. Step 4: Simplify right side
    1,520.67x = 1,688,296.29
  5. Step 5: Solve for x
    x = 1,688,296.29/1,520.67
  6. Step 6: Final answer
    x = 1,110.23

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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.