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Finding the Fourth Proportional to 640,787.64, 884,251.26 and 354,290.52

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Solution

The fourth proportional to 640,787.64, 884,251.26 and 354,290.52 is: 488,901.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,787.64 : 884,251.26 = 354,290.52 : x
  2. Step 2: Convert to fraction form
    640,787.64/884,251.26 = 354,290.52/x
  3. Step 3: Cross multiply
    640,787.64x = 884,251.26 × 354,290.52
  4. Step 4: Simplify right side
    640,787.64x = 313,281,838,716.06
  5. Step 5: Solve for x
    x = 313,281,838,716.06/640,787.64
  6. Step 6: Final answer
    x = 488,901.19

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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.