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Finding the Fourth Proportional to 751.14, 1,125.90 and 425.93

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Solution

The fourth proportional to 751.14, 1,125.90 and 425.93 is: 638.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.14 : 1,125.90 = 425.93 : x
  2. Step 2: Convert to fraction form
    751.14/1,125.90 = 425.93/x
  3. Step 3: Cross multiply
    751.14x = 1,125.90 × 425.93
  4. Step 4: Simplify right side
    751.14x = 479,548.96
  5. Step 5: Solve for x
    x = 479,548.96/751.14
  6. Step 6: Final answer
    x = 638.43

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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.