Home / 2,770.28-4,154.96-921.32

Finding the Fourth Proportional to 2,770.28, 4,154.96 and 921.32

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Solution

The fourth proportional to 2,770.28, 4,154.96 and 921.32 is: 1,381.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,770.28 : 4,154.96 = 921.32 : x
  2. Step 2: Convert to fraction form
    2,770.28/4,154.96 = 921.32/x
  3. Step 3: Cross multiply
    2,770.28x = 4,154.96 × 921.32
  4. Step 4: Simplify right side
    2,770.28x = 3,828,047.75
  5. Step 5: Solve for x
    x = 3,828,047.75/2,770.28
  6. Step 6: Final answer
    x = 1,381.83

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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.