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Finding the Fourth Proportional to 640,218.67, 883,499.95 and 353,736.71

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Solution

The fourth proportional to 640,218.67, 883,499.95 and 353,736.71 is: 488,155.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,218.67 : 883,499.95 = 353,736.71 : x
  2. Step 2: Convert to fraction form
    640,218.67/883,499.95 = 353,736.71/x
  3. Step 3: Cross multiply
    640,218.67x = 883,499.95 × 353,736.71
  4. Step 4: Simplify right side
    640,218.67x = 312,526,366,922.57
  5. Step 5: Solve for x
    x = 312,526,366,922.57/640,218.67
  6. Step 6: Final answer
    x = 488,155.66

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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.