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Finding the Fourth Proportional to 429,252.66, 643,892.84 and 215,904.15

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Solution

The fourth proportional to 429,252.66, 643,892.84 and 215,904.15 is: 323,863.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,252.66 : 643,892.84 = 215,904.15 : x
  2. Step 2: Convert to fraction form
    429,252.66/643,892.84 = 215,904.15/x
  3. Step 3: Cross multiply
    429,252.66x = 643,892.84 × 215,904.15
  4. Step 4: Simplify right side
    429,252.66x = 139,019,135,231.77
  5. Step 5: Solve for x
    x = 139,019,135,231.77/429,252.66
  6. Step 6: Final answer
    x = 323,863.19

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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.