Home / 1,287.15-1,928.93-1,159.12

Finding the Fourth Proportional to 1,287.15, 1,928.93 and 1,159.12

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Solution

The fourth proportional to 1,287.15, 1,928.93 and 1,159.12 is: 1,737.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287.15 : 1,928.93 = 1,159.12 : x
  2. Step 2: Convert to fraction form
    1,287.15/1,928.93 = 1,159.12/x
  3. Step 3: Cross multiply
    1,287.15x = 1,928.93 × 1,159.12
  4. Step 4: Simplify right side
    1,287.15x = 2,235,859.42
  5. Step 5: Solve for x
    x = 2,235,859.42/1,287.15
  6. Step 6: Final answer
    x = 1,737.06

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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.