Home / 1,487.60-2,227.80-1,120.40

Finding the Fourth Proportional to 1,487.60, 2,227.80 and 1,120.40

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Solution

The fourth proportional to 1,487.60, 2,227.80 and 1,120.40 is: 1,677.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.60 : 2,227.80 = 1,120.40 : x
  2. Step 2: Convert to fraction form
    1,487.60/2,227.80 = 1,120.40/x
  3. Step 3: Cross multiply
    1,487.60x = 2,227.80 × 1,120.40
  4. Step 4: Simplify right side
    1,487.60x = 2,496,027.12
  5. Step 5: Solve for x
    x = 2,496,027.12/1,487.60
  6. Step 6: Final answer
    x = 1,677.89

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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.