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Finding the Fourth Proportional to 644,680.65, 889,605.83 and 354,276.95

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Solution

The fourth proportional to 644,680.65, 889,605.83 and 354,276.95 is: 488,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,680.65 : 889,605.83 = 354,276.95 : x
  2. Step 2: Convert to fraction form
    644,680.65/889,605.83 = 354,276.95/x
  3. Step 3: Cross multiply
    644,680.65x = 889,605.83 × 354,276.95
  4. Step 4: Simplify right side
    644,680.65x = 315,166,833,935.21
  5. Step 5: Solve for x
    x = 315,166,833,935.21/644,680.65
  6. Step 6: Final answer
    x = 488,872.80

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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.