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Finding the Fourth Proportional to 429,873.24, 643,593.24 and 328,555.20

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Solution

The fourth proportional to 429,873.24, 643,593.24 and 328,555.20 is: 491,902.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,873.24 : 643,593.24 = 328,555.20 : x
  2. Step 2: Convert to fraction form
    429,873.24/643,593.24 = 328,555.20/x
  3. Step 3: Cross multiply
    429,873.24x = 643,593.24 × 328,555.20
  4. Step 4: Simplify right side
    429,873.24x = 211,455,905,686.85
  5. Step 5: Solve for x
    x = 211,455,905,686.85/429,873.24
  6. Step 6: Final answer
    x = 491,902.93

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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.