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Finding the Fourth Proportional to 751.97, 1,128.32 and 507.96

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Solution

The fourth proportional to 751.97, 1,128.32 and 507.96 is: 762.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.97 : 1,128.32 = 507.96 : x
  2. Step 2: Convert to fraction form
    751.97/1,128.32 = 507.96/x
  3. Step 3: Cross multiply
    751.97x = 1,128.32 × 507.96
  4. Step 4: Simplify right side
    751.97x = 573,135.79
  5. Step 5: Solve for x
    x = 573,135.79/751.97
  6. Step 6: Final answer
    x = 762.18

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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.