Home / 1,488.18-2,219.09-1,387.65

Finding the Fourth Proportional to 1,488.18, 2,219.09 and 1,387.65

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Solution

The fourth proportional to 1,488.18, 2,219.09 and 1,387.65 is: 2,069.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.18 : 2,219.09 = 1,387.65 : x
  2. Step 2: Convert to fraction form
    1,488.18/2,219.09 = 1,387.65/x
  3. Step 3: Cross multiply
    1,488.18x = 2,219.09 × 1,387.65
  4. Step 4: Simplify right side
    1,488.18x = 3,079,320.24
  5. Step 5: Solve for x
    x = 3,079,320.24/1,488.18
  6. Step 6: Final answer
    x = 2,069.19

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1.5x scale

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.