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Finding the Fourth Proportional to 1,578.16, 2,367.92 and 654.39

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Solution

The fourth proportional to 1,578.16, 2,367.92 and 654.39 is: 981.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.16 : 2,367.92 = 654.39 : x
  2. Step 2: Convert to fraction form
    1,578.16/2,367.92 = 654.39/x
  3. Step 3: Cross multiply
    1,578.16x = 2,367.92 × 654.39
  4. Step 4: Simplify right side
    1,578.16x = 1,549,543.17
  5. Step 5: Solve for x
    x = 1,549,543.17/1,578.16
  6. Step 6: Final answer
    x = 981.87

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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.