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Finding the Fourth Proportional to 1,578.61, 2,369.13 and 713.53

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Solution

The fourth proportional to 1,578.61, 2,369.13 and 713.53 is: 1,070.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.61 : 2,369.13 = 713.53 : x
  2. Step 2: Convert to fraction form
    1,578.61/2,369.13 = 713.53/x
  3. Step 3: Cross multiply
    1,578.61x = 2,369.13 × 713.53
  4. Step 4: Simplify right side
    1,578.61x = 1,690,445.33
  5. Step 5: Solve for x
    x = 1,690,445.33/1,578.61
  6. Step 6: Final answer
    x = 1,070.84

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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.