Home / 1,442.81-2,164.76-749.05

Finding the Fourth Proportional to 1,442.81, 2,164.76 and 749.05

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Solution

The fourth proportional to 1,442.81, 2,164.76 and 749.05 is: 1,123.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.81 : 2,164.76 = 749.05 : x
  2. Step 2: Convert to fraction form
    1,442.81/2,164.76 = 749.05/x
  3. Step 3: Cross multiply
    1,442.81x = 2,164.76 × 749.05
  4. Step 4: Simplify right side
    1,442.81x = 1,621,507.13
  5. Step 5: Solve for x
    x = 1,621,507.13/1,442.81
  6. Step 6: Final answer
    x = 1,123.85

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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.