Home / 287,679.21-431,666.70-220,641.87

Finding the Fourth Proportional to 287,679.21, 431,666.70 and 220,641.87

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Solution

The fourth proportional to 287,679.21, 431,666.70 and 220,641.87 is: 331,076.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,679.21 : 431,666.70 = 220,641.87 : x
  2. Step 2: Convert to fraction form
    287,679.21/431,666.70 = 220,641.87/x
  3. Step 3: Cross multiply
    287,679.21x = 431,666.70 × 220,641.87
  4. Step 4: Simplify right side
    287,679.21x = 95,243,747,904.73
  5. Step 5: Solve for x
    x = 95,243,747,904.73/287,679.21
  6. Step 6: Final answer
    x = 331,076.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.