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Finding the Fourth Proportional to 279,184.87, 385,343.55 and 158,396.86

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Solution

The fourth proportional to 279,184.87, 385,343.55 and 158,396.86 is: 218,626.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,184.87 : 385,343.55 = 158,396.86 : x
  2. Step 2: Convert to fraction form
    279,184.87/385,343.55 = 158,396.86/x
  3. Step 3: Cross multiply
    279,184.87x = 385,343.55 × 158,396.86
  4. Step 4: Simplify right side
    279,184.87x = 61,037,208,341.25
  5. Step 5: Solve for x
    x = 61,037,208,341.25/279,184.87
  6. Step 6: Final answer
    x = 218,626.49

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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.