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Finding the Fourth Proportional to 1,632.70, 2,444.73 and 861.58

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Solution

The fourth proportional to 1,632.70, 2,444.73 and 861.58 is: 1,290.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,632.70 : 2,444.73 = 861.58 : x
  2. Step 2: Convert to fraction form
    1,632.70/2,444.73 = 861.58/x
  3. Step 3: Cross multiply
    1,632.70x = 2,444.73 × 861.58
  4. Step 4: Simplify right side
    1,632.70x = 2,106,330.47
  5. Step 5: Solve for x
    x = 2,106,330.47/1,632.70
  6. Step 6: Final answer
    x = 1,290.09

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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.