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Finding the Fourth Proportional to 674,398.80, 1,012,097.21 and 319,413.69

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Solution

The fourth proportional to 674,398.80, 1,012,097.21 and 319,413.69 is: 479,356.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,398.80 : 1,012,097.21 = 319,413.69 : x
  2. Step 2: Convert to fraction form
    674,398.80/1,012,097.21 = 319,413.69/x
  3. Step 3: Cross multiply
    674,398.80x = 1,012,097.21 × 319,413.69
  4. Step 4: Simplify right side
    674,398.80x = 323,277,702,887.74
  5. Step 5: Solve for x
    x = 323,277,702,887.74/674,398.80
  6. Step 6: Final answer
    x = 479,356.88

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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.