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Finding the Fourth Proportional to 3,486.90, 5,230.32 and 890.04

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Solution

The fourth proportional to 3,486.90, 5,230.32 and 890.04 is: 1,335.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.90 : 5,230.32 = 890.04 : x
  2. Step 2: Convert to fraction form
    3,486.90/5,230.32 = 890.04/x
  3. Step 3: Cross multiply
    3,486.90x = 5,230.32 × 890.04
  4. Step 4: Simplify right side
    3,486.90x = 4,655,194.01
  5. Step 5: Solve for x
    x = 4,655,194.01/3,486.90
  6. Step 6: Final answer
    x = 1,335.05

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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.