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Finding the Fourth Proportional to 390,920.31, 586,481.58 and 228,951.09

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Solution

The fourth proportional to 390,920.31, 586,481.58 and 228,951.09 is: 343,485.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,920.31 : 586,481.58 = 228,951.09 : x
  2. Step 2: Convert to fraction form
    390,920.31/586,481.58 = 228,951.09/x
  3. Step 3: Cross multiply
    390,920.31x = 586,481.58 × 228,951.09
  4. Step 4: Simplify right side
    390,920.31x = 134,275,597,005.92
  5. Step 5: Solve for x
    x = 134,275,597,005.92/390,920.31
  6. Step 6: Final answer
    x = 343,485.86

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1.5x scale

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.