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Finding the Fourth Proportional to 5,245.55, 7,869.14 and 1,547.28

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Solution

The fourth proportional to 5,245.55, 7,869.14 and 1,547.28 is: 2,321.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,245.55 : 7,869.14 = 1,547.28 : x
  2. Step 2: Convert to fraction form
    5,245.55/7,869.14 = 1,547.28/x
  3. Step 3: Cross multiply
    5,245.55x = 7,869.14 × 1,547.28
  4. Step 4: Simplify right side
    5,245.55x = 12,175,755.20
  5. Step 5: Solve for x
    x = 12,175,755.20/5,245.55
  6. Step 6: Final answer
    x = 2,321.16

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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.