Home / 4,279.57-6,420.39-1,357.90

Finding the Fourth Proportional to 4,279.57, 6,420.39 and 1,357.90

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Solution

The fourth proportional to 4,279.57, 6,420.39 and 1,357.90 is: 2,037.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,279.57 : 6,420.39 = 1,357.90 : x
  2. Step 2: Convert to fraction form
    4,279.57/6,420.39 = 1,357.90/x
  3. Step 3: Cross multiply
    4,279.57x = 6,420.39 × 1,357.90
  4. Step 4: Simplify right side
    4,279.57x = 8,718,246.11
  5. Step 5: Solve for x
    x = 8,718,246.11/4,279.57
  6. Step 6: Final answer
    x = 2,037.18

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1.5x scale

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.