Home / 4,759.40-7,139.78-1,472.78

Finding the Fourth Proportional to 4,759.40, 7,139.78 and 1,472.78

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Solution

The fourth proportional to 4,759.40, 7,139.78 and 1,472.78 is: 2,209.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,759.40 : 7,139.78 = 1,472.78 : x
  2. Step 2: Convert to fraction form
    4,759.40/7,139.78 = 1,472.78/x
  3. Step 3: Cross multiply
    4,759.40x = 7,139.78 × 1,472.78
  4. Step 4: Simplify right side
    4,759.40x = 10,515,325.19
  5. Step 5: Solve for x
    x = 10,515,325.19/4,759.40
  6. Step 6: Final answer
    x = 2,209.38

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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.