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Finding the Fourth Proportional to 3,487.19, 5,230.92 and 890.19

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Solution

The fourth proportional to 3,487.19, 5,230.92 and 890.19 is: 1,335.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.19 : 5,230.92 = 890.19 : x
  2. Step 2: Convert to fraction form
    3,487.19/5,230.92 = 890.19/x
  3. Step 3: Cross multiply
    3,487.19x = 5,230.92 × 890.19
  4. Step 4: Simplify right side
    3,487.19x = 4,656,512.67
  5. Step 5: Solve for x
    x = 4,656,512.67/3,487.19
  6. Step 6: Final answer
    x = 1,335.32

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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.