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Finding the Fourth Proportional to 643,500.64, 888,013.96 and 353,111.32

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Solution

The fourth proportional to 643,500.64, 888,013.96 and 353,111.32 is: 487,284.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,500.64 : 888,013.96 = 353,111.32 : x
  2. Step 2: Convert to fraction form
    643,500.64/888,013.96 = 353,111.32/x
  3. Step 3: Cross multiply
    643,500.64x = 888,013.96 × 353,111.32
  4. Step 4: Simplify right side
    643,500.64x = 313,567,781,594.03
  5. Step 5: Solve for x
    x = 313,567,781,594.03/643,500.64
  6. Step 6: Final answer
    x = 487,284.34

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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.