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Finding the Fourth Proportional to 664,492.78, 996,836.99 and 215,064.28

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Solution

The fourth proportional to 664,492.78, 996,836.99 and 215,064.28 is: 322,628.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,492.78 : 996,836.99 = 215,064.28 : x
  2. Step 2: Convert to fraction form
    664,492.78/996,836.99 = 215,064.28/x
  3. Step 3: Cross multiply
    664,492.78x = 996,836.99 × 215,064.28
  4. Step 4: Simplify right side
    664,492.78x = 214,384,029,531.72
  5. Step 5: Solve for x
    x = 214,384,029,531.72/664,492.78
  6. Step 6: Final answer
    x = 322,628.08

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Double scale
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Similar ratio
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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.