Home / 2,970.85-4,100.20-1,711.78

Finding the Fourth Proportional to 2,970.85, 4,100.20 and 1,711.78

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Solution

The fourth proportional to 2,970.85, 4,100.20 and 1,711.78 is: 2,362.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,970.85 : 4,100.20 = 1,711.78 : x
  2. Step 2: Convert to fraction form
    2,970.85/4,100.20 = 1,711.78/x
  3. Step 3: Cross multiply
    2,970.85x = 4,100.20 × 1,711.78
  4. Step 4: Simplify right side
    2,970.85x = 7,018,640.36
  5. Step 5: Solve for x
    x = 7,018,640.36/2,970.85
  6. Step 6: Final answer
    x = 2,362.50

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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.