Home / 2,420.20-3,339.90-1,358.19

Finding the Fourth Proportional to 2,420.20, 3,339.90 and 1,358.19

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Solution

The fourth proportional to 2,420.20, 3,339.90 and 1,358.19 is: 1,874.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.20 : 3,339.90 = 1,358.19 : x
  2. Step 2: Convert to fraction form
    2,420.20/3,339.90 = 1,358.19/x
  3. Step 3: Cross multiply
    2,420.20x = 3,339.90 × 1,358.19
  4. Step 4: Simplify right side
    2,420.20x = 4,536,214.08
  5. Step 5: Solve for x
    x = 4,536,214.08/2,420.20
  6. Step 6: Final answer
    x = 1,874.32

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.