Home / 2,770.30-4,154.55-921.10

Finding the Fourth Proportional to 2,770.30, 4,154.55 and 921.10

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Solution

The fourth proportional to 2,770.30, 4,154.55 and 921.10 is: 1,381.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,770.30 : 4,154.55 = 921.10 : x
  2. Step 2: Convert to fraction form
    2,770.30/4,154.55 = 921.10/x
  3. Step 3: Cross multiply
    2,770.30x = 4,154.55 × 921.10
  4. Step 4: Simplify right side
    2,770.30x = 3,826,756.01
  5. Step 5: Solve for x
    x = 3,826,756.01/2,770.30
  6. Step 6: Final answer
    x = 1,381.35

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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.