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Finding the Fourth Proportional to 664,332.60, 996,644.70 and 215,074.20

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Solution

The fourth proportional to 664,332.60, 996,644.70 and 215,074.20 is: 322,658.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,332.60 : 996,644.70 = 215,074.20 : x
  2. Step 2: Convert to fraction form
    664,332.60/996,644.70 = 215,074.20/x
  3. Step 3: Cross multiply
    664,332.60x = 996,644.70 × 215,074.20
  4. Step 4: Simplify right side
    664,332.60x = 214,352,561,536.74
  5. Step 5: Solve for x
    x = 214,352,561,536.74/664,332.60
  6. Step 6: Final answer
    x = 322,658.50

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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.