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Finding the Fourth Proportional to 3,153.56, 4,727.88 and 1,920.32

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Solution

The fourth proportional to 3,153.56, 4,727.88 and 1,920.32 is: 2,878.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,153.56 : 4,727.88 = 1,920.32 : x
  2. Step 2: Convert to fraction form
    3,153.56/4,727.88 = 1,920.32/x
  3. Step 3: Cross multiply
    3,153.56x = 4,727.88 × 1,920.32
  4. Step 4: Simplify right side
    3,153.56x = 9,079,042.52
  5. Step 5: Solve for x
    x = 9,079,042.52/3,153.56
  6. Step 6: Final answer
    x = 2,878.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.