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Finding the Fourth Proportional to 4,951.40, 7,418.10 and 3,918.20

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Solution

The fourth proportional to 4,951.40, 7,418.10 and 3,918.20 is: 5,870.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,951.40 : 7,418.10 = 3,918.20 : x
  2. Step 2: Convert to fraction form
    4,951.40/7,418.10 = 3,918.20/x
  3. Step 3: Cross multiply
    4,951.40x = 7,418.10 × 3,918.20
  4. Step 4: Simplify right side
    4,951.40x = 29,065,599.42
  5. Step 5: Solve for x
    x = 29,065,599.42/4,951.40
  6. Step 6: Final answer
    x = 5,870.18

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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.