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Finding the Fourth Proportional to 356,239.92, 491,392.68 and 279,644.16

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Solution

The fourth proportional to 356,239.92, 491,392.68 and 279,644.16 is: 385,737.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,239.92 : 491,392.68 = 279,644.16 : x
  2. Step 2: Convert to fraction form
    356,239.92/491,392.68 = 279,644.16/x
  3. Step 3: Cross multiply
    356,239.92x = 491,392.68 × 279,644.16
  4. Step 4: Simplify right side
    356,239.92x = 137,415,093,228.75
  5. Step 5: Solve for x
    x = 137,415,093,228.75/356,239.92
  6. Step 6: Final answer
    x = 385,737.49

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1.5x scale

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.