Home / 1,338.60-2,000.08-1,178.20

Finding the Fourth Proportional to 1,338.60, 2,000.08 and 1,178.20

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Solution

The fourth proportional to 1,338.60, 2,000.08 and 1,178.20 is: 1,760.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.60 : 2,000.08 = 1,178.20 : x
  2. Step 2: Convert to fraction form
    1,338.60/2,000.08 = 1,178.20/x
  3. Step 3: Cross multiply
    1,338.60x = 2,000.08 × 1,178.20
  4. Step 4: Simplify right side
    1,338.60x = 2,356,494.26
  5. Step 5: Solve for x
    x = 2,356,494.26/1,338.60
  6. Step 6: Final answer
    x = 1,760.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.