Home / 1,377.26-2,065.84-390.14

Finding the Fourth Proportional to 1,377.26, 2,065.84 and 390.14

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Solution

The fourth proportional to 1,377.26, 2,065.84 and 390.14 is: 585.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.26 : 2,065.84 = 390.14 : x
  2. Step 2: Convert to fraction form
    1,377.26/2,065.84 = 390.14/x
  3. Step 3: Cross multiply
    1,377.26x = 2,065.84 × 390.14
  4. Step 4: Simplify right side
    1,377.26x = 805,966.82
  5. Step 5: Solve for x
    x = 805,966.82/1,377.26
  6. Step 6: Final answer
    x = 585.20

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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.