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Finding the Fourth Proportional to 640,441.91, 960,995.17 and 285,373.35

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Solution

The fourth proportional to 640,441.91, 960,995.17 and 285,373.35 is: 428,208.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,441.91 : 960,995.17 = 285,373.35 : x
  2. Step 2: Convert to fraction form
    640,441.91/960,995.17 = 285,373.35/x
  3. Step 3: Cross multiply
    640,441.91x = 960,995.17 × 285,373.35
  4. Step 4: Simplify right side
    640,441.91x = 274,242,410,996.72
  5. Step 5: Solve for x
    x = 274,242,410,996.72/640,441.91
  6. Step 6: Final answer
    x = 428,208.10

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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.