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Finding the Fourth Proportional to 279,041.36, 385,076.54 and 151,716.65

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Solution

The fourth proportional to 279,041.36, 385,076.54 and 151,716.65 is: 209,368.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,041.36 : 385,076.54 = 151,716.65 : x
  2. Step 2: Convert to fraction form
    279,041.36/385,076.54 = 151,716.65/x
  3. Step 3: Cross multiply
    279,041.36x = 385,076.54 × 151,716.65
  4. Step 4: Simplify right side
    279,041.36x = 58,422,521,096.30
  5. Step 5: Solve for x
    x = 58,422,521,096.30/279,041.36
  6. Step 6: Final answer
    x = 209,368.68

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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.