Home / 4,279.80-6,419.72-1,358.40

Finding the Fourth Proportional to 4,279.80, 6,419.72 and 1,358.40

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Solution

The fourth proportional to 4,279.80, 6,419.72 and 1,358.40 is: 2,037.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,279.80 : 6,419.72 = 1,358.40 : x
  2. Step 2: Convert to fraction form
    4,279.80/6,419.72 = 1,358.40/x
  3. Step 3: Cross multiply
    4,279.80x = 6,419.72 × 1,358.40
  4. Step 4: Simplify right side
    4,279.80x = 8,720,547.65
  5. Step 5: Solve for x
    x = 8,720,547.65/4,279.80
  6. Step 6: Final answer
    x = 2,037.61

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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.