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Finding the Fourth Proportional to 1,077.65, 1,615.37 and 614.48

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Solution

The fourth proportional to 1,077.65, 1,615.37 and 614.48 is: 921.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077.65 : 1,615.37 = 614.48 : x
  2. Step 2: Convert to fraction form
    1,077.65/1,615.37 = 614.48/x
  3. Step 3: Cross multiply
    1,077.65x = 1,615.37 × 614.48
  4. Step 4: Simplify right side
    1,077.65x = 992,618.13
  5. Step 5: Solve for x
    x = 992,618.13/1,077.65
  6. Step 6: Final answer
    x = 921.09

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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.