Home / 1,191.45-1,787.18-313.95

Finding the Fourth Proportional to 1,191.45, 1,787.18 and 313.95

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Solution

The fourth proportional to 1,191.45, 1,787.18 and 313.95 is: 470.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.45 : 1,787.18 = 313.95 : x
  2. Step 2: Convert to fraction form
    1,191.45/1,787.18 = 313.95/x
  3. Step 3: Cross multiply
    1,191.45x = 1,787.18 × 313.95
  4. Step 4: Simplify right side
    1,191.45x = 561,083.59
  5. Step 5: Solve for x
    x = 561,083.59/1,191.45
  6. Step 6: Final answer
    x = 470.93

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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.