Home / 3,487.52-5,231.13-890.40

Finding the Fourth Proportional to 3,487.52, 5,231.13 and 890.40

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Solution

The fourth proportional to 3,487.52, 5,231.13 and 890.40 is: 1,335.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.52 : 5,231.13 = 890.40 : x
  2. Step 2: Convert to fraction form
    3,487.52/5,231.13 = 890.40/x
  3. Step 3: Cross multiply
    3,487.52x = 5,231.13 × 890.40
  4. Step 4: Simplify right side
    3,487.52x = 4,657,798.15
  5. Step 5: Solve for x
    x = 4,657,798.15/3,487.52
  6. Step 6: Final answer
    x = 1,335.56

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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.