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Finding the Fourth Proportional to 3,311.88, 4,969.98 and 2,987.88

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Solution

The fourth proportional to 3,311.88, 4,969.98 and 2,987.88 is: 4,483.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,311.88 : 4,969.98 = 2,987.88 : x
  2. Step 2: Convert to fraction form
    3,311.88/4,969.98 = 2,987.88/x
  3. Step 3: Cross multiply
    3,311.88x = 4,969.98 × 2,987.88
  4. Step 4: Simplify right side
    3,311.88x = 14,849,703.84
  5. Step 5: Solve for x
    x = 14,849,703.84/3,311.88
  6. Step 6: Final answer
    x = 4,483.77

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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.