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Finding the Fourth Proportional to 658,312.40, 987,367.49 and 208,974.89

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Solution

The fourth proportional to 658,312.40, 987,367.49 and 208,974.89 is: 313,430.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,312.40 : 987,367.49 = 208,974.89 : x
  2. Step 2: Convert to fraction form
    658,312.40/987,367.49 = 208,974.89/x
  3. Step 3: Cross multiply
    658,312.40x = 987,367.49 × 208,974.89
  4. Step 4: Simplify right side
    658,312.40x = 206,335,014,819.53
  5. Step 5: Solve for x
    x = 206,335,014,819.53/658,312.40
  6. Step 6: Final answer
    x = 313,430.24

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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.