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Finding the Fourth Proportional to 755.54, 1,042.61 and 456.86

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Solution

The fourth proportional to 755.54, 1,042.61 and 456.86 is: 630.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.54 : 1,042.61 = 456.86 : x
  2. Step 2: Convert to fraction form
    755.54/1,042.61 = 456.86/x
  3. Step 3: Cross multiply
    755.54x = 1,042.61 × 456.86
  4. Step 4: Simplify right side
    755.54x = 476,326.83
  5. Step 5: Solve for x
    x = 476,326.83/755.54
  6. Step 6: Final answer
    x = 630.45

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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.