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Finding the Fourth Proportional to 521,851.84, 783,040.56 and 388,998.88

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Solution

The fourth proportional to 521,851.84, 783,040.56 and 388,998.88 is: 583,694.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,851.84 : 783,040.56 = 388,998.88 : x
  2. Step 2: Convert to fraction form
    521,851.84/783,040.56 = 388,998.88/x
  3. Step 3: Cross multiply
    521,851.84x = 783,040.56 × 388,998.88
  4. Step 4: Simplify right side
    521,851.84x = 304,601,900,834.57
  5. Step 5: Solve for x
    x = 304,601,900,834.57/521,851.84
  6. Step 6: Final answer
    x = 583,694.22

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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.