Home / 1,142.04-1,712.81-320.42

Finding the Fourth Proportional to 1,142.04, 1,712.81 and 320.42

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Solution

The fourth proportional to 1,142.04, 1,712.81 and 320.42 is: 480.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.04 : 1,712.81 = 320.42 : x
  2. Step 2: Convert to fraction form
    1,142.04/1,712.81 = 320.42/x
  3. Step 3: Cross multiply
    1,142.04x = 1,712.81 × 320.42
  4. Step 4: Simplify right side
    1,142.04x = 548,808.41
  5. Step 5: Solve for x
    x = 548,808.41/1,142.04
  6. Step 6: Final answer
    x = 480.55

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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.