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Finding the Fourth Proportional to 429,349.95, 643,506.53 and 218,879.55

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Solution

The fourth proportional to 429,349.95, 643,506.53 and 218,879.55 is: 328,055.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,349.95 : 643,506.53 = 218,879.55 : x
  2. Step 2: Convert to fraction form
    429,349.95/643,506.53 = 218,879.55/x
  3. Step 3: Cross multiply
    429,349.95x = 643,506.53 × 218,879.55
  4. Step 4: Simplify right side
    429,349.95x = 140,850,418,614.06
  5. Step 5: Solve for x
    x = 140,850,418,614.06/429,349.95
  6. Step 6: Final answer
    x = 328,055.05

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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.