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Finding the Fourth Proportional to 640,551.15, 883,945.04 and 354,063.87

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Solution

The fourth proportional to 640,551.15, 883,945.04 and 354,063.87 is: 488,599.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,551.15 : 883,945.04 = 354,063.87 : x
  2. Step 2: Convert to fraction form
    640,551.15/883,945.04 = 354,063.87/x
  3. Step 3: Cross multiply
    640,551.15x = 883,945.04 × 354,063.87
  4. Step 4: Simplify right side
    640,551.15x = 312,972,999,959.39
  5. Step 5: Solve for x
    x = 312,972,999,959.39/640,551.15
  6. Step 6: Final answer
    x = 488,599.54

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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.