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Finding the Fourth Proportional to 640,456.25, 883,875.39 and 353,970.18

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Solution

The fourth proportional to 640,456.25, 883,875.39 and 353,970.18 is: 488,504.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,456.25 : 883,875.39 = 353,970.18 : x
  2. Step 2: Convert to fraction form
    640,456.25/883,875.39 = 353,970.18/x
  3. Step 3: Cross multiply
    640,456.25x = 883,875.39 × 353,970.18
  4. Step 4: Simplify right side
    640,456.25x = 312,865,530,895.87
  5. Step 5: Solve for x
    x = 312,865,530,895.87/640,456.25
  6. Step 6: Final answer
    x = 488,504.15

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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.