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Finding the Fourth Proportional to 640,095.66, 959,921.15 and 356,219.42

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Solution

The fourth proportional to 640,095.66, 959,921.15 and 356,219.42 is: 534,205.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,095.66 : 959,921.15 = 356,219.42 : x
  2. Step 2: Convert to fraction form
    640,095.66/959,921.15 = 356,219.42/x
  3. Step 3: Cross multiply
    640,095.66x = 959,921.15 × 356,219.42
  4. Step 4: Simplify right side
    640,095.66x = 341,942,548,718.03
  5. Step 5: Solve for x
    x = 341,942,548,718.03/640,095.66
  6. Step 6: Final answer
    x = 534,205.39

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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.