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Finding the Fourth Proportional to 1,718.68, 2,372 and 1,055.28

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Solution

The fourth proportional to 1,718.68, 2,372 and 1,055.28 is: 1,456.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.68 : 2,372 = 1,055.28 : x
  2. Step 2: Convert to fraction form
    1,718.68/2,372 = 1,055.28/x
  3. Step 3: Cross multiply
    1,718.68x = 2,372 × 1,055.28
  4. Step 4: Simplify right side
    1,718.68x = 2,503,124.16
  5. Step 5: Solve for x
    x = 2,503,124.16/1,718.68
  6. Step 6: Final answer
    x = 1,456.42

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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.