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Finding the Fourth Proportional to 1,266,811.20, 1,748,227.80 and 722,936.16

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Solution

The fourth proportional to 1,266,811.20, 1,748,227.80 and 722,936.16 is: 997,668.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266,811.20 : 1,748,227.80 = 722,936.16 : x
  2. Step 2: Convert to fraction form
    1,266,811.20/1,748,227.80 = 722,936.16/x
  3. Step 3: Cross multiply
    1,266,811.20x = 1,748,227.80 × 722,936.16
  4. Step 4: Simplify right side
    1,266,811.20x = 1,263,857,092,537.25
  5. Step 5: Solve for x
    x = 1,263,857,092,537.25/1,266,811.20
  6. Step 6: Final answer
    x = 997,668.08

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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.