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Finding the Fourth Proportional to 3,385.65, 4,672.19 and 1,970.18

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Solution

The fourth proportional to 3,385.65, 4,672.19 and 1,970.18 is: 2,718.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,385.65 : 4,672.19 = 1,970.18 : x
  2. Step 2: Convert to fraction form
    3,385.65/4,672.19 = 1,970.18/x
  3. Step 3: Cross multiply
    3,385.65x = 4,672.19 × 1,970.18
  4. Step 4: Simplify right side
    3,385.65x = 9,205,022.08
  5. Step 5: Solve for x
    x = 9,205,022.08/3,385.65
  6. Step 6: Final answer
    x = 2,718.83

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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.