Home / 1,231.08-1,847.70-1,159.80

Finding the Fourth Proportional to 1,231.08, 1,847.70 and 1,159.80

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Solution

The fourth proportional to 1,231.08, 1,847.70 and 1,159.80 is: 1,740.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.08 : 1,847.70 = 1,159.80 : x
  2. Step 2: Convert to fraction form
    1,231.08/1,847.70 = 1,159.80/x
  3. Step 3: Cross multiply
    1,231.08x = 1,847.70 × 1,159.80
  4. Step 4: Simplify right side
    1,231.08x = 2,142,962.46
  5. Step 5: Solve for x
    x = 2,142,962.46/1,231.08
  6. Step 6: Final answer
    x = 1,740.72

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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.