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Finding the Fourth Proportional to 751.59, 1,127.34 and 318.69

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Solution

The fourth proportional to 751.59, 1,127.34 and 318.69 is: 478.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.59 : 1,127.34 = 318.69 : x
  2. Step 2: Convert to fraction form
    751.59/1,127.34 = 318.69/x
  3. Step 3: Cross multiply
    751.59x = 1,127.34 × 318.69
  4. Step 4: Simplify right side
    751.59x = 359,271.98
  5. Step 5: Solve for x
    x = 359,271.98/751.59
  6. Step 6: Final answer
    x = 478.02

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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.