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Finding the Fourth Proportional to 288,391.28, 395,089.50 and 277,609.64

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Solution

The fourth proportional to 288,391.28, 395,089.50 and 277,609.64 is: 380,318.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,391.28 : 395,089.50 = 277,609.64 : x
  2. Step 2: Convert to fraction form
    288,391.28/395,089.50 = 277,609.64/x
  3. Step 3: Cross multiply
    288,391.28x = 395,089.50 × 277,609.64
  4. Step 4: Simplify right side
    288,391.28x = 109,680,653,862.78
  5. Step 5: Solve for x
    x = 109,680,653,862.78/288,391.28
  6. Step 6: Final answer
    x = 380,318.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.