Home / 3,123.70-4,686.90-1,479.40

Finding the Fourth Proportional to 3,123.70, 4,686.90 and 1,479.40

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Solution

The fourth proportional to 3,123.70, 4,686.90 and 1,479.40 is: 2,219.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.70 : 4,686.90 = 1,479.40 : x
  2. Step 2: Convert to fraction form
    3,123.70/4,686.90 = 1,479.40/x
  3. Step 3: Cross multiply
    3,123.70x = 4,686.90 × 1,479.40
  4. Step 4: Simplify right side
    3,123.70x = 6,933,799.86
  5. Step 5: Solve for x
    x = 6,933,799.86/3,123.70
  6. Step 6: Final answer
    x = 2,219.74

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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.