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Finding the Fourth Proportional to 279,880.72, 385,930.16 and 189,079.02

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Solution

The fourth proportional to 279,880.72, 385,930.16 and 189,079.02 is: 260,722.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,880.72 : 385,930.16 = 189,079.02 : x
  2. Step 2: Convert to fraction form
    279,880.72/385,930.16 = 189,079.02/x
  3. Step 3: Cross multiply
    279,880.72x = 385,930.16 × 189,079.02
  4. Step 4: Simplify right side
    279,880.72x = 72,971,296,204.89
  5. Step 5: Solve for x
    x = 72,971,296,204.89/279,880.72
  6. Step 6: Final answer
    x = 260,722.84

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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.