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Finding the Fourth Proportional to 751.74, 1,129.50 and 477.96

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Solution

The fourth proportional to 751.74, 1,129.50 and 477.96 is: 718.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.74 : 1,129.50 = 477.96 : x
  2. Step 2: Convert to fraction form
    751.74/1,129.50 = 477.96/x
  3. Step 3: Cross multiply
    751.74x = 1,129.50 × 477.96
  4. Step 4: Simplify right side
    751.74x = 539,855.82
  5. Step 5: Solve for x
    x = 539,855.82/751.74
  6. Step 6: Final answer
    x = 718.14

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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.