Home / 1,357.10-2,035.65-1,287.85

Finding the Fourth Proportional to 1,357.10, 2,035.65 and 1,287.85

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Solution

The fourth proportional to 1,357.10, 2,035.65 and 1,287.85 is: 1,931.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.10 : 2,035.65 = 1,287.85 : x
  2. Step 2: Convert to fraction form
    1,357.10/2,035.65 = 1,287.85/x
  3. Step 3: Cross multiply
    1,357.10x = 2,035.65 × 1,287.85
  4. Step 4: Simplify right side
    1,357.10x = 2,621,611.85
  5. Step 5: Solve for x
    x = 2,621,611.85/1,357.10
  6. Step 6: Final answer
    x = 1,931.78

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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.