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Finding the Fourth Proportional to 1,242.27, 1,713.91 and 888.23

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Solution

The fourth proportional to 1,242.27, 1,713.91 and 888.23 is: 1,225.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.27 : 1,713.91 = 888.23 : x
  2. Step 2: Convert to fraction form
    1,242.27/1,713.91 = 888.23/x
  3. Step 3: Cross multiply
    1,242.27x = 1,713.91 × 888.23
  4. Step 4: Simplify right side
    1,242.27x = 1,522,341.84
  5. Step 5: Solve for x
    x = 1,522,341.84/1,242.27
  6. Step 6: Final answer
    x = 1,225.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.