Home / 2,421.90-3,342.23-1,345.19

Finding the Fourth Proportional to 2,421.90, 3,342.23 and 1,345.19

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Solution

The fourth proportional to 2,421.90, 3,342.23 and 1,345.19 is: 1,856.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.90 : 3,342.23 = 1,345.19 : x
  2. Step 2: Convert to fraction form
    2,421.90/3,342.23 = 1,345.19/x
  3. Step 3: Cross multiply
    2,421.90x = 3,342.23 × 1,345.19
  4. Step 4: Simplify right side
    2,421.90x = 4,495,934.78
  5. Step 5: Solve for x
    x = 4,495,934.78/2,421.90
  6. Step 6: Final answer
    x = 1,856.37

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Half scale
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Double scale
Find fourth proportional to 2,422.90, 3,343.61 and 1,346.19
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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.