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Finding the Fourth Proportional to 279,211.61, 385,225.08 and 158,343.41

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Solution

The fourth proportional to 279,211.61, 385,225.08 and 158,343.41 is: 218,464.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,211.61 : 385,225.08 = 158,343.41 : x
  2. Step 2: Convert to fraction form
    279,211.61/385,225.08 = 158,343.41/x
  3. Step 3: Cross multiply
    279,211.61x = 385,225.08 × 158,343.41
  4. Step 4: Simplify right side
    279,211.61x = 60,997,852,784.72
  5. Step 5: Solve for x
    x = 60,997,852,784.72/279,211.61
  6. Step 6: Final answer
    x = 218,464.60

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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.