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Finding the Fourth Proportional to 644,019.45, 966,509.10 and 245,438.70

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Solution

The fourth proportional to 644,019.45, 966,509.10 and 245,438.70 is: 368,340.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,019.45 : 966,509.10 = 245,438.70 : x
  2. Step 2: Convert to fraction form
    644,019.45/966,509.10 = 245,438.70/x
  3. Step 3: Cross multiply
    644,019.45x = 966,509.10 × 245,438.70
  4. Step 4: Simplify right side
    644,019.45x = 237,218,737,042.17
  5. Step 5: Solve for x
    x = 237,218,737,042.17/644,019.45
  6. Step 6: Final answer
    x = 368,340.95

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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.