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Finding the Fourth Proportional to 319,016.40, 478,524.60 and 287,523.60

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Solution

The fourth proportional to 319,016.40, 478,524.60 and 287,523.60 is: 431,285.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,016.40 : 478,524.60 = 287,523.60 : x
  2. Step 2: Convert to fraction form
    319,016.40/478,524.60 = 287,523.60/x
  3. Step 3: Cross multiply
    319,016.40x = 478,524.60 × 287,523.60
  4. Step 4: Simplify right side
    319,016.40x = 137,587,115,680.56
  5. Step 5: Solve for x
    x = 137,587,115,680.56/319,016.40
  6. Step 6: Final answer
    x = 431,285.40

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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.