Home / 1,327.42-1,981.36-1,155.30

Finding the Fourth Proportional to 1,327.42, 1,981.36 and 1,155.30

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Solution

The fourth proportional to 1,327.42, 1,981.36 and 1,155.30 is: 1,724.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.42 : 1,981.36 = 1,155.30 : x
  2. Step 2: Convert to fraction form
    1,327.42/1,981.36 = 1,155.30/x
  3. Step 3: Cross multiply
    1,327.42x = 1,981.36 × 1,155.30
  4. Step 4: Simplify right side
    1,327.42x = 2,289,065.21
  5. Step 5: Solve for x
    x = 2,289,065.21/1,327.42
  6. Step 6: Final answer
    x = 1,724.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.