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Finding the Fourth Proportional to 5,114.40, 7,665.98 and 2,918.28

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Solution

The fourth proportional to 5,114.40, 7,665.98 and 2,918.28 is: 4,374.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,114.40 : 7,665.98 = 2,918.28 : x
  2. Step 2: Convert to fraction form
    5,114.40/7,665.98 = 2,918.28/x
  3. Step 3: Cross multiply
    5,114.40x = 7,665.98 × 2,918.28
  4. Step 4: Simplify right side
    5,114.40x = 22,371,476.11
  5. Step 5: Solve for x
    x = 22,371,476.11/5,114.40
  6. Step 6: Final answer
    x = 4,374.21

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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.