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Finding the Fourth Proportional to 918,645.51, 1,377,879.16 and 278,954.78

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Solution

The fourth proportional to 918,645.51, 1,377,879.16 and 278,954.78 is: 418,405.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,645.51 : 1,377,879.16 = 278,954.78 : x
  2. Step 2: Convert to fraction form
    918,645.51/1,377,879.16 = 278,954.78/x
  3. Step 3: Cross multiply
    918,645.51x = 1,377,879.16 × 278,954.78
  4. Step 4: Simplify right side
    918,645.51x = 384,365,976,549.61
  5. Step 5: Solve for x
    x = 384,365,976,549.61/918,645.51
  6. Step 6: Final answer
    x = 418,405.11

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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.