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Finding the Fourth Proportional to 328,562.20, 491,921.70 and 319,346.20

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Solution

The fourth proportional to 328,562.20, 491,921.70 and 319,346.20 is: 478,123.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,562.20 : 491,921.70 = 319,346.20 : x
  2. Step 2: Convert to fraction form
    328,562.20/491,921.70 = 319,346.20/x
  3. Step 3: Cross multiply
    328,562.20x = 491,921.70 × 319,346.20
  4. Step 4: Simplify right side
    328,562.20x = 157,093,325,592.54
  5. Step 5: Solve for x
    x = 157,093,325,592.54/328,562.20
  6. Step 6: Final answer
    x = 478,123.55

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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.