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Finding the Fourth Proportional to 658,639.80, 987,959.70 and 259,062.14

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Solution

The fourth proportional to 658,639.80, 987,959.70 and 259,062.14 is: 388,593.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,639.80 : 987,959.70 = 259,062.14 : x
  2. Step 2: Convert to fraction form
    658,639.80/987,959.70 = 259,062.14/x
  3. Step 3: Cross multiply
    658,639.80x = 987,959.70 × 259,062.14
  4. Step 4: Simplify right side
    658,639.80x = 255,942,956,585.66
  5. Step 5: Solve for x
    x = 255,942,956,585.66/658,639.80
  6. Step 6: Final answer
    x = 388,593.21

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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.