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Finding the Fourth Proportional to 1,147.18, 1,720.86 and 325.47

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Solution

The fourth proportional to 1,147.18, 1,720.86 and 325.47 is: 488.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.18 : 1,720.86 = 325.47 : x
  2. Step 2: Convert to fraction form
    1,147.18/1,720.86 = 325.47/x
  3. Step 3: Cross multiply
    1,147.18x = 1,720.86 × 325.47
  4. Step 4: Simplify right side
    1,147.18x = 560,088.30
  5. Step 5: Solve for x
    x = 560,088.30/1,147.18
  6. Step 6: Final answer
    x = 488.23

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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.