Home / 1,311.29-1,966.95-337.40

Finding the Fourth Proportional to 1,311.29, 1,966.95 and 337.40

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Solution

The fourth proportional to 1,311.29, 1,966.95 and 337.40 is: 506.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.29 : 1,966.95 = 337.40 : x
  2. Step 2: Convert to fraction form
    1,311.29/1,966.95 = 337.40/x
  3. Step 3: Cross multiply
    1,311.29x = 1,966.95 × 337.40
  4. Step 4: Simplify right side
    1,311.29x = 663,648.93
  5. Step 5: Solve for x
    x = 663,648.93/1,311.29
  6. Step 6: Final answer
    x = 506.10

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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.