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Finding the Fourth Proportional to 640,076.60, 883,293 and 353,594

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Solution

The fourth proportional to 640,076.60, 883,293 and 353,594 is: 487,952.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,076.60 : 883,293 = 353,594 : x
  2. Step 2: Convert to fraction form
    640,076.60/883,293 = 353,594/x
  3. Step 3: Cross multiply
    640,076.60x = 883,293 × 353,594
  4. Step 4: Simplify right side
    640,076.60x = 312,327,105,042
  5. Step 5: Solve for x
    x = 312,327,105,042/640,076.60
  6. Step 6: Final answer
    x = 487,952.70

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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.