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Finding the Fourth Proportional to 279,398.53, 385,602.80 and 156,911.04

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Solution

The fourth proportional to 279,398.53, 385,602.80 and 156,911.04 is: 216,555.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,398.53 : 385,602.80 = 156,911.04 : x
  2. Step 2: Convert to fraction form
    279,398.53/385,602.80 = 156,911.04/x
  3. Step 3: Cross multiply
    279,398.53x = 385,602.80 × 156,911.04
  4. Step 4: Simplify right side
    279,398.53x = 60,505,336,374.91
  5. Step 5: Solve for x
    x = 60,505,336,374.91/279,398.53
  6. Step 6: Final answer
    x = 216,555.67

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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.