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Finding the Fourth Proportional to 399,554.65, 550,870.90 and 284,963.95

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Solution

The fourth proportional to 399,554.65, 550,870.90 and 284,963.95 is: 392,883.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,554.65 : 550,870.90 = 284,963.95 : x
  2. Step 2: Convert to fraction form
    399,554.65/550,870.90 = 284,963.95/x
  3. Step 3: Cross multiply
    399,554.65x = 550,870.90 × 284,963.95
  4. Step 4: Simplify right side
    399,554.65x = 156,978,347,604.06
  5. Step 5: Solve for x
    x = 156,978,347,604.06/399,554.65
  6. Step 6: Final answer
    x = 392,883.30

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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.