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Finding the Fourth Proportional to 5,910.40, 8,878.80 and 4,938.40

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Solution

The fourth proportional to 5,910.40, 8,878.80 and 4,938.40 is: 7,418.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,910.40 : 8,878.80 = 4,938.40 : x
  2. Step 2: Convert to fraction form
    5,910.40/8,878.80 = 4,938.40/x
  3. Step 3: Cross multiply
    5,910.40x = 8,878.80 × 4,938.40
  4. Step 4: Simplify right side
    5,910.40x = 43,847,065.92
  5. Step 5: Solve for x
    x = 43,847,065.92/5,910.40
  6. Step 6: Final answer
    x = 7,418.63

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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.