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Finding the Fourth Proportional to 2,770.98, 4,155.08 and 921.44

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Solution

The fourth proportional to 2,770.98, 4,155.08 and 921.44 is: 1,381.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,770.98 : 4,155.08 = 921.44 : x
  2. Step 2: Convert to fraction form
    2,770.98/4,155.08 = 921.44/x
  3. Step 3: Cross multiply
    2,770.98x = 4,155.08 × 921.44
  4. Step 4: Simplify right side
    2,770.98x = 3,828,652.31
  5. Step 5: Solve for x
    x = 3,828,652.31/2,770.98
  6. Step 6: Final answer
    x = 1,381.70

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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.