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Finding the Fourth Proportional to 2,169.28, 2,985.60 and 1,725.76

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Solution

The fourth proportional to 2,169.28, 2,985.60 and 1,725.76 is: 2,375.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.28 : 2,985.60 = 1,725.76 : x
  2. Step 2: Convert to fraction form
    2,169.28/2,985.60 = 1,725.76/x
  3. Step 3: Cross multiply
    2,169.28x = 2,985.60 × 1,725.76
  4. Step 4: Simplify right side
    2,169.28x = 5,152,429.06
  5. Step 5: Solve for x
    x = 5,152,429.06/2,169.28
  6. Step 6: Final answer
    x = 2,375.18

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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.