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Finding the Fourth Proportional to 1,266,643.71, 1,747,934.19 and 722,769.66

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Solution

The fourth proportional to 1,266,643.71, 1,747,934.19 and 722,769.66 is: 997,402.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266,643.71 : 1,747,934.19 = 722,769.66 : x
  2. Step 2: Convert to fraction form
    1,266,643.71/1,747,934.19 = 722,769.66/x
  3. Step 3: Cross multiply
    1,266,643.71x = 1,747,934.19 × 722,769.66
  4. Step 4: Simplify right side
    1,266,643.71x = 1,263,353,800,208.68
  5. Step 5: Solve for x
    x = 1,263,353,800,208.68/1,266,643.71
  6. Step 6: Final answer
    x = 997,402.66

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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.