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Finding the Fourth Proportional to 644,332.65, 889,190.07 and 353,956.45

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Solution

The fourth proportional to 644,332.65, 889,190.07 and 353,956.45 is: 488,465.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,332.65 : 889,190.07 = 353,956.45 : x
  2. Step 2: Convert to fraction form
    644,332.65/889,190.07 = 353,956.45/x
  3. Step 3: Cross multiply
    644,332.65x = 889,190.07 × 353,956.45
  4. Step 4: Simplify right side
    644,332.65x = 314,734,560,552.45
  5. Step 5: Solve for x
    x = 314,734,560,552.45/644,332.65
  6. Step 6: Final answer
    x = 488,465.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.