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Finding the Fourth Proportional to 3,487.64, 5,231.01 and 890.42

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Solution

The fourth proportional to 3,487.64, 5,231.01 and 890.42 is: 1,335.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.64 : 5,231.01 = 890.42 : x
  2. Step 2: Convert to fraction form
    3,487.64/5,231.01 = 890.42/x
  3. Step 3: Cross multiply
    3,487.64x = 5,231.01 × 890.42
  4. Step 4: Simplify right side
    3,487.64x = 4,657,795.92
  5. Step 5: Solve for x
    x = 4,657,795.92/3,487.64
  6. Step 6: Final answer
    x = 1,335.52

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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.