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Finding the Fourth Proportional to 617,145.96, 851,318.46 and 358,993.86

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Solution

The fourth proportional to 617,145.96, 851,318.46 and 358,993.86 is: 495,212.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,145.96 : 851,318.46 = 358,993.86 : x
  2. Step 2: Convert to fraction form
    617,145.96/851,318.46 = 358,993.86/x
  3. Step 3: Cross multiply
    617,145.96x = 851,318.46 × 358,993.86
  4. Step 4: Simplify right side
    617,145.96x = 305,618,100,044.66
  5. Step 5: Solve for x
    x = 305,618,100,044.66/617,145.96
  6. Step 6: Final answer
    x = 495,212.02

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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.