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Finding the Fourth Proportional to 1,432.98, 1,977.48 and 843.53

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Solution

The fourth proportional to 1,432.98, 1,977.48 and 843.53 is: 1,164.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.98 : 1,977.48 = 843.53 : x
  2. Step 2: Convert to fraction form
    1,432.98/1,977.48 = 843.53/x
  3. Step 3: Cross multiply
    1,432.98x = 1,977.48 × 843.53
  4. Step 4: Simplify right side
    1,432.98x = 1,668,053.82
  5. Step 5: Solve for x
    x = 1,668,053.82/1,432.98
  6. Step 6: Final answer
    x = 1,164.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.