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Finding the Fourth Proportional to 643,999.41, 888,674.58 and 357,496.88

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Solution

The fourth proportional to 643,999.41, 888,674.58 and 357,496.88 is: 493,320.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,999.41 : 888,674.58 = 357,496.88 : x
  2. Step 2: Convert to fraction form
    643,999.41/888,674.58 = 357,496.88/x
  3. Step 3: Cross multiply
    643,999.41x = 888,674.58 × 357,496.88
  4. Step 4: Simplify right side
    643,999.41x = 317,698,385,241.94
  5. Step 5: Solve for x
    x = 317,698,385,241.94/643,999.41
  6. Step 6: Final answer
    x = 493,320.93

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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.