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Finding the Fourth Proportional to 1,432.81, 1,977.41 and 873.15

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Solution

The fourth proportional to 1,432.81, 1,977.41 and 873.15 is: 1,205.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.81 : 1,977.41 = 873.15 : x
  2. Step 2: Convert to fraction form
    1,432.81/1,977.41 = 873.15/x
  3. Step 3: Cross multiply
    1,432.81x = 1,977.41 × 873.15
  4. Step 4: Simplify right side
    1,432.81x = 1,726,575.54
  5. Step 5: Solve for x
    x = 1,726,575.54/1,432.81
  6. Step 6: Final answer
    x = 1,205.03

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1.5x scale

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.