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Finding the Fourth Proportional to 617,245.92, 927,421.65 and 392,706.63

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Solution

The fourth proportional to 617,245.92, 927,421.65 and 392,706.63 is: 590,047.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,245.92 : 927,421.65 = 392,706.63 : x
  2. Step 2: Convert to fraction form
    617,245.92/927,421.65 = 392,706.63/x
  3. Step 3: Cross multiply
    617,245.92x = 927,421.65 × 392,706.63
  4. Step 4: Simplify right side
    617,245.92x = 364,204,630,760.54
  5. Step 5: Solve for x
    x = 364,204,630,760.54/617,245.92
  6. Step 6: Final answer
    x = 590,047.85

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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.