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Finding the Fourth Proportional to 647,571, 893,647.98 and 379,299

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Solution

The fourth proportional to 647,571, 893,647.98 and 379,299 is: 523,432.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,571 : 893,647.98 = 379,299 : x
  2. Step 2: Convert to fraction form
    647,571/893,647.98 = 379,299/x
  3. Step 3: Cross multiply
    647,571x = 893,647.98 × 379,299
  4. Step 4: Simplify right side
    647,571x = 338,959,785,166.02
  5. Step 5: Solve for x
    x = 338,959,785,166.02/647,571
  6. Step 6: Final answer
    x = 523,432.62

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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.