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Finding the Fourth Proportional to 820,718.22, 1,131,538.08 and 672,999.02

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Solution

The fourth proportional to 820,718.22, 1,131,538.08 and 672,999.02 is: 927,875.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,718.22 : 1,131,538.08 = 672,999.02 : x
  2. Step 2: Convert to fraction form
    820,718.22/1,131,538.08 = 672,999.02/x
  3. Step 3: Cross multiply
    820,718.22x = 1,131,538.08 × 672,999.02
  4. Step 4: Simplify right side
    820,718.22x = 761,524,016,557.94
  5. Step 5: Solve for x
    x = 761,524,016,557.94/820,718.22
  6. Step 6: Final answer
    x = 927,875.12

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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.