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Finding the Fourth Proportional to 5,640.46, 7,778.10 and 3,401.89

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Solution

The fourth proportional to 5,640.46, 7,778.10 and 3,401.89 is: 4,691.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.46 : 7,778.10 = 3,401.89 : x
  2. Step 2: Convert to fraction form
    5,640.46/7,778.10 = 3,401.89/x
  3. Step 3: Cross multiply
    5,640.46x = 7,778.10 × 3,401.89
  4. Step 4: Simplify right side
    5,640.46x = 26,460,240.61
  5. Step 5: Solve for x
    x = 26,460,240.61/5,640.46
  6. Step 6: Final answer
    x = 4,691.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.