Home / 429,346.20-643,500.90-218,875.80

Finding the Fourth Proportional to 429,346.20, 643,500.90 and 218,875.80

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Solution

The fourth proportional to 429,346.20, 643,500.90 and 218,875.80 is: 328,049.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,346.20 : 643,500.90 = 218,875.80 : x
  2. Step 2: Convert to fraction form
    429,346.20/643,500.90 = 218,875.80/x
  3. Step 3: Cross multiply
    429,346.20x = 643,500.90 × 218,875.80
  4. Step 4: Simplify right side
    429,346.20x = 140,846,774,288.22
  5. Step 5: Solve for x
    x = 140,846,774,288.22/429,346.20
  6. Step 6: Final answer
    x = 328,049.43

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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.