Home / 2,420.78-3,339.68-1,581.19

Finding the Fourth Proportional to 2,420.78, 3,339.68 and 1,581.19

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Solution

The fourth proportional to 2,420.78, 3,339.68 and 1,581.19 is: 2,181.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.78 : 3,339.68 = 1,581.19 : x
  2. Step 2: Convert to fraction form
    2,420.78/3,339.68 = 1,581.19/x
  3. Step 3: Cross multiply
    2,420.78x = 3,339.68 × 1,581.19
  4. Step 4: Simplify right side
    2,420.78x = 5,280,652.36
  5. Step 5: Solve for x
    x = 5,280,652.36/2,420.78
  6. Step 6: Final answer
    x = 2,181.39

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Half scale
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Double scale
Find fourth proportional to 2,421.78, 3,341.05 and 1,582.19
Similar ratio
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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.