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Finding the Fourth Proportional to 384,758.62, 531,307.32 and 239,811.78

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Solution

The fourth proportional to 384,758.62, 531,307.32 and 239,811.78 is: 331,152.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,758.62 : 531,307.32 = 239,811.78 : x
  2. Step 2: Convert to fraction form
    384,758.62/531,307.32 = 239,811.78/x
  3. Step 3: Cross multiply
    384,758.62x = 531,307.32 × 239,811.78
  4. Step 4: Simplify right side
    384,758.62x = 127,413,754,136.23
  5. Step 5: Solve for x
    x = 127,413,754,136.23/384,758.62
  6. Step 6: Final answer
    x = 331,152.44

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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.