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Finding the Fourth Proportional to 2,159.55, 3,239.34 and 925.92

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Solution

The fourth proportional to 2,159.55, 3,239.34 and 925.92 is: 1,388.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.55 : 3,239.34 = 925.92 : x
  2. Step 2: Convert to fraction form
    2,159.55/3,239.34 = 925.92/x
  3. Step 3: Cross multiply
    2,159.55x = 3,239.34 × 925.92
  4. Step 4: Simplify right side
    2,159.55x = 2,999,369.69
  5. Step 5: Solve for x
    x = 2,999,369.69/2,159.55
  6. Step 6: Final answer
    x = 1,388.89

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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.