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Finding the Fourth Proportional to 3,123.87, 4,311.90 and 1,798.47

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Solution

The fourth proportional to 3,123.87, 4,311.90 and 1,798.47 is: 2,482.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.87 : 4,311.90 = 1,798.47 : x
  2. Step 2: Convert to fraction form
    3,123.87/4,311.90 = 1,798.47/x
  3. Step 3: Cross multiply
    3,123.87x = 4,311.90 × 1,798.47
  4. Step 4: Simplify right side
    3,123.87x = 7,754,822.79
  5. Step 5: Solve for x
    x = 7,754,822.79/3,123.87
  6. Step 6: Final answer
    x = 2,482.44

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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.