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Finding the Fourth Proportional to 279,237.72, 385,335.90 and 155,050.96

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Solution

The fourth proportional to 279,237.72, 385,335.90 and 155,050.96 is: 213,963.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,237.72 : 385,335.90 = 155,050.96 : x
  2. Step 2: Convert to fraction form
    279,237.72/385,335.90 = 155,050.96/x
  3. Step 3: Cross multiply
    279,237.72x = 385,335.90 × 155,050.96
  4. Step 4: Simplify right side
    279,237.72x = 59,746,701,217.46
  5. Step 5: Solve for x
    x = 59,746,701,217.46/279,237.72
  6. Step 6: Final answer
    x = 213,963.58

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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.