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Finding the Fourth Proportional to 639,404.34, 957,875.49 and 399,611.94

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Solution

The fourth proportional to 639,404.34, 957,875.49 and 399,611.94 is: 598,648.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,404.34 : 957,875.49 = 399,611.94 : x
  2. Step 2: Convert to fraction form
    639,404.34/957,875.49 = 399,611.94/x
  3. Step 3: Cross multiply
    639,404.34x = 957,875.49 × 399,611.94
  4. Step 4: Simplify right side
    639,404.34x = 382,778,482,837.35
  5. Step 5: Solve for x
    x = 382,778,482,837.35/639,404.34
  6. Step 6: Final answer
    x = 598,648.55

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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.