Home / 1,380.22-2,068.90-1,031.10

Finding the Fourth Proportional to 1,380.22, 2,068.90 and 1,031.10

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Solution

The fourth proportional to 1,380.22, 2,068.90 and 1,031.10 is: 1,545.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.22 : 2,068.90 = 1,031.10 : x
  2. Step 2: Convert to fraction form
    1,380.22/2,068.90 = 1,031.10/x
  3. Step 3: Cross multiply
    1,380.22x = 2,068.90 × 1,031.10
  4. Step 4: Simplify right side
    1,380.22x = 2,133,242.79
  5. Step 5: Solve for x
    x = 2,133,242.79/1,380.22
  6. Step 6: Final answer
    x = 1,545.58

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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.