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Finding the Fourth Proportional to 640,523.98, 960,459.54 and 213,906.34

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Solution

The fourth proportional to 640,523.98, 960,459.54 and 213,906.34 is: 320,750.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,523.98 : 960,459.54 = 213,906.34 : x
  2. Step 2: Convert to fraction form
    640,523.98/960,459.54 = 213,906.34/x
  3. Step 3: Cross multiply
    640,523.98x = 960,459.54 × 213,906.34
  4. Step 4: Simplify right side
    640,523.98x = 205,448,384,919.48
  5. Step 5: Solve for x
    x = 205,448,384,919.48/640,523.98
  6. Step 6: Final answer
    x = 320,750.50

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1.5x scale

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.