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Finding the Fourth Proportional to 1,278,510.82, 1,917,974.31 and 479,855.14

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Solution

The fourth proportional to 1,278,510.82, 1,917,974.31 and 479,855.14 is: 719,860.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,510.82 : 1,917,974.31 = 479,855.14 : x
  2. Step 2: Convert to fraction form
    1,278,510.82/1,917,974.31 = 479,855.14/x
  3. Step 3: Cross multiply
    1,278,510.82x = 1,917,974.31 × 479,855.14
  4. Step 4: Simplify right side
    1,278,510.82x = 920,349,831,041.45
  5. Step 5: Solve for x
    x = 920,349,831,041.45/1,278,510.82
  6. Step 6: Final answer
    x = 719,860.81

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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.