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Finding the Fourth Proportional to 2,169.72, 2,988.18 and 1,874.88

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Solution

The fourth proportional to 2,169.72, 2,988.18 and 1,874.88 is: 2,582.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.72 : 2,988.18 = 1,874.88 : x
  2. Step 2: Convert to fraction form
    2,169.72/2,988.18 = 1,874.88/x
  3. Step 3: Cross multiply
    2,169.72x = 2,988.18 × 1,874.88
  4. Step 4: Simplify right side
    2,169.72x = 5,602,478.92
  5. Step 5: Solve for x
    x = 5,602,478.92/2,169.72
  6. Step 6: Final answer
    x = 2,582.12

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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.