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Finding the Fourth Proportional to 643,504.48, 888,019.26 and 353,115.16

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Solution

The fourth proportional to 643,504.48, 888,019.26 and 353,115.16 is: 487,289.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,504.48 : 888,019.26 = 353,115.16 : x
  2. Step 2: Convert to fraction form
    643,504.48/888,019.26 = 353,115.16/x
  3. Step 3: Cross multiply
    643,504.48x = 888,019.26 × 353,115.16
  4. Step 4: Simplify right side
    643,504.48x = 313,573,063,077.98
  5. Step 5: Solve for x
    x = 313,573,063,077.98/643,504.48
  6. Step 6: Final answer
    x = 487,289.63

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1.5x scale

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.