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Finding the Fourth Proportional to 2,891.80, 4,337.70 and 2,782.45

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Solution

The fourth proportional to 2,891.80, 4,337.70 and 2,782.45 is: 4,173.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.80 : 4,337.70 = 2,782.45 : x
  2. Step 2: Convert to fraction form
    2,891.80/4,337.70 = 2,782.45/x
  3. Step 3: Cross multiply
    2,891.80x = 4,337.70 × 2,782.45
  4. Step 4: Simplify right side
    2,891.80x = 12,069,433.37
  5. Step 5: Solve for x
    x = 12,069,433.37/2,891.80
  6. Step 6: Final answer
    x = 4,173.68

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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.