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Finding the Fourth Proportional to 3,001.76, 4,503.20 and 921.72

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Solution

The fourth proportional to 3,001.76, 4,503.20 and 921.72 is: 1,382.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,001.76 : 4,503.20 = 921.72 : x
  2. Step 2: Convert to fraction form
    3,001.76/4,503.20 = 921.72/x
  3. Step 3: Cross multiply
    3,001.76x = 4,503.20 × 921.72
  4. Step 4: Simplify right side
    3,001.76x = 4,150,689.50
  5. Step 5: Solve for x
    x = 4,150,689.50/3,001.76
  6. Step 6: Final answer
    x = 1,382.75

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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.