Home / 1,450.13-2,172.12-981.89

Finding the Fourth Proportional to 1,450.13, 2,172.12 and 981.89

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Solution

The fourth proportional to 1,450.13, 2,172.12 and 981.89 is: 1,470.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,450.13 : 2,172.12 = 981.89 : x
  2. Step 2: Convert to fraction form
    1,450.13/2,172.12 = 981.89/x
  3. Step 3: Cross multiply
    1,450.13x = 2,172.12 × 981.89
  4. Step 4: Simplify right side
    1,450.13x = 2,132,788.34
  5. Step 5: Solve for x
    x = 2,132,788.34/1,450.13
  6. Step 6: Final answer
    x = 1,470.75

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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.