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Finding the Fourth Proportional to 751.46, 1,127.19 and 318.53

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Solution

The fourth proportional to 751.46, 1,127.19 and 318.53 is: 477.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.46 : 1,127.19 = 318.53 : x
  2. Step 2: Convert to fraction form
    751.46/1,127.19 = 318.53/x
  3. Step 3: Cross multiply
    751.46x = 1,127.19 × 318.53
  4. Step 4: Simplify right side
    751.46x = 359,043.83
  5. Step 5: Solve for x
    x = 359,043.83/751.46
  6. Step 6: Final answer
    x = 477.80

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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.