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Finding the Fourth Proportional to 2,158.47, 3,237.31 and 577.21

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Solution

The fourth proportional to 2,158.47, 3,237.31 and 577.21 is: 865.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.47 : 3,237.31 = 577.21 : x
  2. Step 2: Convert to fraction form
    2,158.47/3,237.31 = 577.21/x
  3. Step 3: Cross multiply
    2,158.47x = 3,237.31 × 577.21
  4. Step 4: Simplify right side
    2,158.47x = 1,868,607.71
  5. Step 5: Solve for x
    x = 1,868,607.71/2,158.47
  6. Step 6: Final answer
    x = 865.71

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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.