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Finding the Fourth Proportional to 680,620.48, 1,020,930.84 and 280,822

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Solution

The fourth proportional to 680,620.48, 1,020,930.84 and 280,822 is: 421,233.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,620.48 : 1,020,930.84 = 280,822 : x
  2. Step 2: Convert to fraction form
    680,620.48/1,020,930.84 = 280,822/x
  3. Step 3: Cross multiply
    680,620.48x = 1,020,930.84 × 280,822
  4. Step 4: Simplify right side
    680,620.48x = 286,699,840,350.48
  5. Step 5: Solve for x
    x = 286,699,840,350.48/680,620.48
  6. Step 6: Final answer
    x = 421,233.05

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