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Finding the Fourth Proportional to 4,878.55, 6,733.29 and 2,990.85

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Solution

The fourth proportional to 4,878.55, 6,733.29 and 2,990.85 is: 4,127.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,878.55 : 6,733.29 = 2,990.85 : x
  2. Step 2: Convert to fraction form
    4,878.55/6,733.29 = 2,990.85/x
  3. Step 3: Cross multiply
    4,878.55x = 6,733.29 × 2,990.85
  4. Step 4: Simplify right side
    4,878.55x = 20,138,260.40
  5. Step 5: Solve for x
    x = 20,138,260.40/4,878.55
  6. Step 6: Final answer
    x = 4,127.92

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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.