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Finding the Fourth Proportional to 643,812.72, 888,454.84 and 357,335.28

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Solution

The fourth proportional to 643,812.72, 888,454.84 and 357,335.28 is: 493,118.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,812.72 : 888,454.84 = 357,335.28 : x
  2. Step 2: Convert to fraction form
    643,812.72/888,454.84 = 357,335.28/x
  3. Step 3: Cross multiply
    643,812.72x = 888,454.84 × 357,335.28
  4. Step 4: Simplify right side
    643,812.72x = 317,476,259,018.76
  5. Step 5: Solve for x
    x = 317,476,259,018.76/643,812.72
  6. Step 6: Final answer
    x = 493,118.96

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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.