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Finding the Fourth Proportional to 206,718.40, 310,077.60 and 192,721.60

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Solution

The fourth proportional to 206,718.40, 310,077.60 and 192,721.60 is: 289,082.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,718.40 : 310,077.60 = 192,721.60 : x
  2. Step 2: Convert to fraction form
    206,718.40/310,077.60 = 192,721.60/x
  3. Step 3: Cross multiply
    206,718.40x = 310,077.60 × 192,721.60
  4. Step 4: Simplify right side
    206,718.40x = 59,758,651,196.16
  5. Step 5: Solve for x
    x = 59,758,651,196.16/206,718.40
  6. Step 6: Final answer
    x = 289,082.40

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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.