Home / 2,152.20-2,970.03-1,220.70

Finding the Fourth Proportional to 2,152.20, 2,970.03 and 1,220.70

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Solution

The fourth proportional to 2,152.20, 2,970.03 and 1,220.70 is: 1,684.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,152.20 : 2,970.03 = 1,220.70 : x
  2. Step 2: Convert to fraction form
    2,152.20/2,970.03 = 1,220.70/x
  3. Step 3: Cross multiply
    2,152.20x = 2,970.03 × 1,220.70
  4. Step 4: Simplify right side
    2,152.20x = 3,625,501.13
  5. Step 5: Solve for x
    x = 3,625,501.13/2,152.20
  6. Step 6: Final answer
    x = 1,684.56

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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.