Home / 1,387.20-2,069.93-1,379.10

Finding the Fourth Proportional to 1,387.20, 2,069.93 and 1,379.10

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Solution

The fourth proportional to 1,387.20, 2,069.93 and 1,379.10 is: 2,057.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.20 : 2,069.93 = 1,379.10 : x
  2. Step 2: Convert to fraction form
    1,387.20/2,069.93 = 1,379.10/x
  3. Step 3: Cross multiply
    1,387.20x = 2,069.93 × 1,379.10
  4. Step 4: Simplify right side
    1,387.20x = 2,854,643.91
  5. Step 5: Solve for x
    x = 2,854,643.91/1,387.20
  6. Step 6: Final answer
    x = 2,057.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.