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Finding the Fourth Proportional to 1,572.18, 2,169.54 and 873.60

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Solution

The fourth proportional to 1,572.18, 2,169.54 and 873.60 is: 1,205.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.18 : 2,169.54 = 873.60 : x
  2. Step 2: Convert to fraction form
    1,572.18/2,169.54 = 873.60/x
  3. Step 3: Cross multiply
    1,572.18x = 2,169.54 × 873.60
  4. Step 4: Simplify right side
    1,572.18x = 1,895,310.14
  5. Step 5: Solve for x
    x = 1,895,310.14/1,572.18
  6. Step 6: Final answer
    x = 1,205.53

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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.