Home / 1,970.18-2,720.11-1,225.15

Finding the Fourth Proportional to 1,970.18, 2,720.11 and 1,225.15

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Solution

The fourth proportional to 1,970.18, 2,720.11 and 1,225.15 is: 1,691.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,970.18 : 2,720.11 = 1,225.15 : x
  2. Step 2: Convert to fraction form
    1,970.18/2,720.11 = 1,225.15/x
  3. Step 3: Cross multiply
    1,970.18x = 2,720.11 × 1,225.15
  4. Step 4: Simplify right side
    1,970.18x = 3,332,550.00
  5. Step 5: Solve for x
    x = 3,332,550.00/1,970.18
  6. Step 6: Final answer
    x = 1,691.50

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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.