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Finding the Fourth Proportional to 1,266,807.21, 1,748,222.28 and 722,932.17

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Solution

The fourth proportional to 1,266,807.21, 1,748,222.28 and 722,932.17 is: 997,662.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266,807.21 : 1,748,222.28 = 722,932.17 : x
  2. Step 2: Convert to fraction form
    1,266,807.21/1,748,222.28 = 722,932.17/x
  3. Step 3: Cross multiply
    1,266,807.21x = 1,748,222.28 × 722,932.17
  4. Step 4: Simplify right side
    1,266,807.21x = 1,263,846,126,522.75
  5. Step 5: Solve for x
    x = 1,263,846,126,522.75/1,266,807.21
  6. Step 6: Final answer
    x = 997,662.56

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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.