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Finding the Fourth Proportional to 483,915.67, 667,838.72 and 290,331.77

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Solution

The fourth proportional to 483,915.67, 667,838.72 and 290,331.77 is: 400,678.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,915.67 : 667,838.72 = 290,331.77 : x
  2. Step 2: Convert to fraction form
    483,915.67/667,838.72 = 290,331.77/x
  3. Step 3: Cross multiply
    483,915.67x = 667,838.72 × 290,331.77
  4. Step 4: Simplify right side
    483,915.67x = 193,894,796,917.07
  5. Step 5: Solve for x
    x = 193,894,796,917.07/483,915.67
  6. Step 6: Final answer
    x = 400,678.90

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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.