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Finding the Fourth Proportional to 279,709.40, 419,564.10 and 161,611.40

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Solution

The fourth proportional to 279,709.40, 419,564.10 and 161,611.40 is: 242,417.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,709.40 : 419,564.10 = 161,611.40 : x
  2. Step 2: Convert to fraction form
    279,709.40/419,564.10 = 161,611.40/x
  3. Step 3: Cross multiply
    279,709.40x = 419,564.10 × 161,611.40
  4. Step 4: Simplify right side
    279,709.40x = 67,806,341,590.74
  5. Step 5: Solve for x
    x = 67,806,341,590.74/279,709.40
  6. Step 6: Final answer
    x = 242,417.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.