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Finding the Fourth Proportional to 1,207.42, 1,665.64 and 759.83

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Solution

The fourth proportional to 1,207.42, 1,665.64 and 759.83 is: 1,048.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.42 : 1,665.64 = 759.83 : x
  2. Step 2: Convert to fraction form
    1,207.42/1,665.64 = 759.83/x
  3. Step 3: Cross multiply
    1,207.42x = 1,665.64 × 759.83
  4. Step 4: Simplify right side
    1,207.42x = 1,265,595.86
  5. Step 5: Solve for x
    x = 1,265,595.86/1,207.42
  6. Step 6: Final answer
    x = 1,048.18

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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.