Home / 1,678.38-2,518.42-1,123.46

Finding the Fourth Proportional to 1,678.38, 2,518.42 and 1,123.46

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Solution

The fourth proportional to 1,678.38, 2,518.42 and 1,123.46 is: 1,685.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.38 : 2,518.42 = 1,123.46 : x
  2. Step 2: Convert to fraction form
    1,678.38/2,518.42 = 1,123.46/x
  3. Step 3: Cross multiply
    1,678.38x = 2,518.42 × 1,123.46
  4. Step 4: Simplify right side
    1,678.38x = 2,829,344.13
  5. Step 5: Solve for x
    x = 2,829,344.13/1,678.38
  6. Step 6: Final answer
    x = 1,685.76

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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.