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Finding the Fourth Proportional to 1,539.19, 2,308.65 and 614.50

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Solution

The fourth proportional to 1,539.19, 2,308.65 and 614.50 is: 921.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.19 : 2,308.65 = 614.50 : x
  2. Step 2: Convert to fraction form
    1,539.19/2,308.65 = 614.50/x
  3. Step 3: Cross multiply
    1,539.19x = 2,308.65 × 614.50
  4. Step 4: Simplify right side
    1,539.19x = 1,418,665.43
  5. Step 5: Solve for x
    x = 1,418,665.43/1,539.19
  6. Step 6: Final answer
    x = 921.70

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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.