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Finding the Fourth Proportional to 279,937,381.60, 419,906,072.40 and 210,961,151.20

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Solution

The fourth proportional to 279,937,381.60, 419,906,072.40 and 210,961,151.20 is: 316,441,726.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,937,381.60 : 419,906,072.40 = 210,961,151.20 : x
  2. Step 2: Convert to fraction form
    279,937,381.60/419,906,072.40 = 210,961,151.20/x
  3. Step 3: Cross multiply
    279,937,381.60x = 419,906,072.40 × 210,961,151.20
  4. Step 4: Simplify right side
    279,937,381.60x = 88,583,868,429,374,544
  5. Step 5: Solve for x
    x = 88,583,868,429,374,544/279,937,381.60
  6. Step 6: Final answer
    x = 316,441,726.80

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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.