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Finding the Fourth Proportional to 643,881.72, 888,567.21 and 353,520.06

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Solution

The fourth proportional to 643,881.72, 888,567.21 and 353,520.06 is: 487,863.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,881.72 : 888,567.21 = 353,520.06 : x
  2. Step 2: Convert to fraction form
    643,881.72/888,567.21 = 353,520.06/x
  3. Step 3: Cross multiply
    643,881.72x = 888,567.21 × 353,520.06
  4. Step 4: Simplify right side
    643,881.72x = 314,126,333,393.23
  5. Step 5: Solve for x
    x = 314,126,333,393.23/643,881.72
  6. Step 6: Final answer
    x = 487,863.41

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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.