Home / 1,345.11-2,013.35-909.87

Finding the Fourth Proportional to 1,345.11, 2,013.35 and 909.87

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Solution

The fourth proportional to 1,345.11, 2,013.35 and 909.87 is: 1,361.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.11 : 2,013.35 = 909.87 : x
  2. Step 2: Convert to fraction form
    1,345.11/2,013.35 = 909.87/x
  3. Step 3: Cross multiply
    1,345.11x = 2,013.35 × 909.87
  4. Step 4: Simplify right side
    1,345.11x = 1,831,882.22
  5. Step 5: Solve for x
    x = 1,831,882.22/1,345.11
  6. Step 6: Final answer
    x = 1,361.88

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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.