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Finding the Fourth Proportional to 786,969.80, 1,181,642.70 and 628,728.20

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Solution

The fourth proportional to 786,969.80, 1,181,642.70 and 628,728.20 is: 944,041.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,969.80 : 1,181,642.70 = 628,728.20 : x
  2. Step 2: Convert to fraction form
    786,969.80/1,181,642.70 = 628,728.20/x
  3. Step 3: Cross multiply
    786,969.80x = 1,181,642.70 × 628,728.20
  4. Step 4: Simplify right side
    786,969.80x = 742,932,087,814.14
  5. Step 5: Solve for x
    x = 742,932,087,814.14/786,969.80
  6. Step 6: Final answer
    x = 944,041.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.