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Finding the Fourth Proportional to 279,212.97, 385,302.71 and 151,885.83

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Solution

The fourth proportional to 279,212.97, 385,302.71 and 151,885.83 is: 209,596.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,212.97 : 385,302.71 = 151,885.83 : x
  2. Step 2: Convert to fraction form
    279,212.97/385,302.71 = 151,885.83/x
  3. Step 3: Cross multiply
    279,212.97x = 385,302.71 × 151,885.83
  4. Step 4: Simplify right side
    279,212.97x = 58,522,021,150.17
  5. Step 5: Solve for x
    x = 58,522,021,150.17/279,212.97
  6. Step 6: Final answer
    x = 209,596.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.