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Finding the Fourth Proportional to 643,808.64, 888,422.74 and 382,174.93

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Solution

The fourth proportional to 643,808.64, 888,422.74 and 382,174.93 is: 527,381.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,808.64 : 888,422.74 = 382,174.93 : x
  2. Step 2: Convert to fraction form
    643,808.64/888,422.74 = 382,174.93/x
  3. Step 3: Cross multiply
    643,808.64x = 888,422.74 × 382,174.93
  4. Step 4: Simplify right side
    643,808.64x = 339,532,898,469.91
  5. Step 5: Solve for x
    x = 339,532,898,469.91/643,808.64
  6. Step 6: Final answer
    x = 527,381.71

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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.