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Finding the Fourth Proportional to 750.96, 1,127.61 and 505.80

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Solution

The fourth proportional to 750.96, 1,127.61 and 505.80 is: 759.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.96 : 1,127.61 = 505.80 : x
  2. Step 2: Convert to fraction form
    750.96/1,127.61 = 505.80/x
  3. Step 3: Cross multiply
    750.96x = 1,127.61 × 505.80
  4. Step 4: Simplify right side
    750.96x = 570,345.14
  5. Step 5: Solve for x
    x = 570,345.14/750.96
  6. Step 6: Final answer
    x = 759.49

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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.