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Finding the Fourth Proportional to 2,913.80, 4,370.70 and 2,755.40

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Solution

The fourth proportional to 2,913.80, 4,370.70 and 2,755.40 is: 4,133.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,913.80 : 4,370.70 = 2,755.40 : x
  2. Step 2: Convert to fraction form
    2,913.80/4,370.70 = 2,755.40/x
  3. Step 3: Cross multiply
    2,913.80x = 4,370.70 × 2,755.40
  4. Step 4: Simplify right side
    2,913.80x = 12,043,026.78
  5. Step 5: Solve for x
    x = 12,043,026.78/2,913.80
  6. Step 6: Final answer
    x = 4,133.10

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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.