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Finding the Fourth Proportional to 658,351.88, 987,330.99 and 342,636.56

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Solution

The fourth proportional to 658,351.88, 987,330.99 and 342,636.56 is: 513,852.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,351.88 : 987,330.99 = 342,636.56 : x
  2. Step 2: Convert to fraction form
    658,351.88/987,330.99 = 342,636.56/x
  3. Step 3: Cross multiply
    658,351.88x = 987,330.99 × 342,636.56
  4. Step 4: Simplify right side
    658,351.88x = 338,295,697,672.12
  5. Step 5: Solve for x
    x = 338,295,697,672.12/658,351.88
  6. Step 6: Final answer
    x = 513,852.40

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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.