Home / 1,191.50-1,787.36-314.12

Finding the Fourth Proportional to 1,191.50, 1,787.36 and 314.12

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Solution

The fourth proportional to 1,191.50, 1,787.36 and 314.12 is: 471.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.50 : 1,787.36 = 314.12 : x
  2. Step 2: Convert to fraction form
    1,191.50/1,787.36 = 314.12/x
  3. Step 3: Cross multiply
    1,191.50x = 1,787.36 × 314.12
  4. Step 4: Simplify right side
    1,191.50x = 561,445.52
  5. Step 5: Solve for x
    x = 561,445.52/1,191.50
  6. Step 6: Final answer
    x = 471.21

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Double scale
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1.5x scale

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.