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Finding the Fourth Proportional to 643,902.54, 888,578.91 and 357,415.26

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Solution

The fourth proportional to 643,902.54, 888,578.91 and 357,415.26 is: 493,229.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,902.54 : 888,578.91 = 357,415.26 : x
  2. Step 2: Convert to fraction form
    643,902.54/888,578.91 = 357,415.26/x
  3. Step 3: Cross multiply
    643,902.54x = 888,578.91 × 357,415.26
  4. Step 4: Simplify right side
    643,902.54x = 317,591,662,148.17
  5. Step 5: Solve for x
    x = 317,591,662,148.17/643,902.54
  6. Step 6: Final answer
    x = 493,229.40

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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.