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Finding the Fourth Proportional to 757.98, 1,130.53 and 672.32

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Solution

The fourth proportional to 757.98, 1,130.53 and 672.32 is: 1,002.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.98 : 1,130.53 = 672.32 : x
  2. Step 2: Convert to fraction form
    757.98/1,130.53 = 672.32/x
  3. Step 3: Cross multiply
    757.98x = 1,130.53 × 672.32
  4. Step 4: Simplify right side
    757.98x = 760,077.93
  5. Step 5: Solve for x
    x = 760,077.93/757.98
  6. Step 6: Final answer
    x = 1,002.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.