Home / 1,420.73-2,127.50-1,189.04

Finding the Fourth Proportional to 1,420.73, 2,127.50 and 1,189.04

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Solution

The fourth proportional to 1,420.73, 2,127.50 and 1,189.04 is: 1,780.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.73 : 2,127.50 = 1,189.04 : x
  2. Step 2: Convert to fraction form
    1,420.73/2,127.50 = 1,189.04/x
  3. Step 3: Cross multiply
    1,420.73x = 2,127.50 × 1,189.04
  4. Step 4: Simplify right side
    1,420.73x = 2,529,690.89
  5. Step 5: Solve for x
    x = 2,529,690.89/1,420.73
  6. Step 6: Final answer
    x = 1,780.55

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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.