Home / 1,153.04-1,728.81-979.76

Finding the Fourth Proportional to 1,153.04, 1,728.81 and 979.76

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Solution

The fourth proportional to 1,153.04, 1,728.81 and 979.76 is: 1,469.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.04 : 1,728.81 = 979.76 : x
  2. Step 2: Convert to fraction form
    1,153.04/1,728.81 = 979.76/x
  3. Step 3: Cross multiply
    1,153.04x = 1,728.81 × 979.76
  4. Step 4: Simplify right side
    1,153.04x = 1,693,823.21
  5. Step 5: Solve for x
    x = 1,693,823.21/1,153.04
  6. Step 6: Final answer
    x = 1,469.01

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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.