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Finding the Fourth Proportional to 640,448.68, 883,766 and 353,968.70

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Solution

The fourth proportional to 640,448.68, 883,766 and 353,968.70 is: 488,447.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,448.68 : 883,766 = 353,968.70 : x
  2. Step 2: Convert to fraction form
    640,448.68/883,766 = 353,968.70/x
  3. Step 3: Cross multiply
    640,448.68x = 883,766 × 353,968.70
  4. Step 4: Simplify right side
    640,448.68x = 312,825,502,124.20
  5. Step 5: Solve for x
    x = 312,825,502,124.20/640,448.68
  6. Step 6: Final answer
    x = 488,447.41

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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.