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Finding the Fourth Proportional to 2,281.25, 3,421.92 and 742.25

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Solution

The fourth proportional to 2,281.25, 3,421.92 and 742.25 is: 1,113.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,281.25 : 3,421.92 = 742.25 : x
  2. Step 2: Convert to fraction form
    2,281.25/3,421.92 = 742.25/x
  3. Step 3: Cross multiply
    2,281.25x = 3,421.92 × 742.25
  4. Step 4: Simplify right side
    2,281.25x = 2,539,920.12
  5. Step 5: Solve for x
    x = 2,539,920.12/2,281.25
  6. Step 6: Final answer
    x = 1,113.39

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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.