Home / 1,724.18-2,378.85-1,557.86

Finding the Fourth Proportional to 1,724.18, 2,378.85 and 1,557.86

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Solution

The fourth proportional to 1,724.18, 2,378.85 and 1,557.86 is: 2,149.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.18 : 2,378.85 = 1,557.86 : x
  2. Step 2: Convert to fraction form
    1,724.18/2,378.85 = 1,557.86/x
  3. Step 3: Cross multiply
    1,724.18x = 2,378.85 × 1,557.86
  4. Step 4: Simplify right side
    1,724.18x = 3,705,915.26
  5. Step 5: Solve for x
    x = 3,705,915.26/1,724.18
  6. Step 6: Final answer
    x = 2,149.38

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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.