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Finding the Fourth Proportional to 1,965,729.67, 2,713,543.95 and 1,321,523.52

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Solution

The fourth proportional to 1,965,729.67, 2,713,543.95 and 1,321,523.52 is: 1,824,265.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965,729.67 : 2,713,543.95 = 1,321,523.52 : x
  2. Step 2: Convert to fraction form
    1,965,729.67/2,713,543.95 = 1,321,523.52/x
  3. Step 3: Cross multiply
    1,965,729.67x = 2,713,543.95 × 1,321,523.52
  4. Step 4: Simplify right side
    1,965,729.67x = 3,586,012,152,478.70
  5. Step 5: Solve for x
    x = 3,586,012,152,478.70/1,965,729.67
  6. Step 6: Final answer
    x = 1,824,265.16

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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.