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Finding the Fourth Proportional to 640,153.22, 883,420.71 and 353,679.89

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Solution

The fourth proportional to 640,153.22, 883,420.71 and 353,679.89 is: 488,083.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,153.22 : 883,420.71 = 353,679.89 : x
  2. Step 2: Convert to fraction form
    640,153.22/883,420.71 = 353,679.89/x
  3. Step 3: Cross multiply
    640,153.22x = 883,420.71 × 353,679.89
  4. Step 4: Simplify right side
    640,153.22x = 312,448,139,536.52
  5. Step 5: Solve for x
    x = 312,448,139,536.52/640,153.22
  6. Step 6: Final answer
    x = 488,083.37

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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.