Home / 3,124.47-4,311.83-1,780.28

Finding the Fourth Proportional to 3,124.47, 4,311.83 and 1,780.28

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Solution

The fourth proportional to 3,124.47, 4,311.83 and 1,780.28 is: 2,456.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.47 : 4,311.83 = 1,780.28 : x
  2. Step 2: Convert to fraction form
    3,124.47/4,311.83 = 1,780.28/x
  3. Step 3: Cross multiply
    3,124.47x = 4,311.83 × 1,780.28
  4. Step 4: Simplify right side
    3,124.47x = 7,676,263.77
  5. Step 5: Solve for x
    x = 7,676,263.77/3,124.47
  6. Step 6: Final answer
    x = 2,456.82

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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.