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Finding the Fourth Proportional to 279,214.57, 385,315.81 and 151,889.86

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Solution

The fourth proportional to 279,214.57, 385,315.81 and 151,889.86 is: 209,607.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,214.57 : 385,315.81 = 151,889.86 : x
  2. Step 2: Convert to fraction form
    279,214.57/385,315.81 = 151,889.86/x
  3. Step 3: Cross multiply
    279,214.57x = 385,315.81 × 151,889.86
  4. Step 4: Simplify right side
    279,214.57x = 58,525,564,436.69
  5. Step 5: Solve for x
    x = 58,525,564,436.69/279,214.57
  6. Step 6: Final answer
    x = 209,607.85

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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.