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Finding the Fourth Proportional to 319,003.62, 478,480.31 and 139,084.80

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Solution

The fourth proportional to 319,003.62, 478,480.31 and 139,084.80 is: 208,616.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,003.62 : 478,480.31 = 139,084.80 : x
  2. Step 2: Convert to fraction form
    319,003.62/478,480.31 = 139,084.80/x
  3. Step 3: Cross multiply
    319,003.62x = 478,480.31 × 139,084.80
  4. Step 4: Simplify right side
    319,003.62x = 66,549,337,524.86
  5. Step 5: Solve for x
    x = 66,549,337,524.86/319,003.62
  6. Step 6: Final answer
    x = 208,616.25

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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.