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Finding the Fourth Proportional to 617,147.96, 851,321.22 and 358,995.86

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Solution

The fourth proportional to 617,147.96, 851,321.22 and 358,995.86 is: 495,214.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,147.96 : 851,321.22 = 358,995.86 : x
  2. Step 2: Convert to fraction form
    617,147.96/851,321.22 = 358,995.86/x
  3. Step 3: Cross multiply
    617,147.96x = 851,321.22 × 358,995.86
  4. Step 4: Simplify right side
    617,147.96x = 305,620,793,510.15
  5. Step 5: Solve for x
    x = 305,620,793,510.15/617,147.96
  6. Step 6: Final answer
    x = 495,214.78

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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.