Home / 2,770.70-4,154.95-921.30

Finding the Fourth Proportional to 2,770.70, 4,154.95 and 921.30

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Solution

The fourth proportional to 2,770.70, 4,154.95 and 921.30 is: 1,381.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,770.70 : 4,154.95 = 921.30 : x
  2. Step 2: Convert to fraction form
    2,770.70/4,154.95 = 921.30/x
  3. Step 3: Cross multiply
    2,770.70x = 4,154.95 × 921.30
  4. Step 4: Simplify right side
    2,770.70x = 3,827,955.44
  5. Step 5: Solve for x
    x = 3,827,955.44/2,770.70
  6. Step 6: Final answer
    x = 1,381.58

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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.