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Finding the Fourth Proportional to 289,590.56, 399,191.98 and 203,307.49

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Solution

The fourth proportional to 289,590.56, 399,191.98 and 203,307.49 is: 280,253.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,590.56 : 399,191.98 = 203,307.49 : x
  2. Step 2: Convert to fraction form
    289,590.56/399,191.98 = 203,307.49/x
  3. Step 3: Cross multiply
    289,590.56x = 399,191.98 × 203,307.49
  4. Step 4: Simplify right side
    289,590.56x = 81,158,719,853.85
  5. Step 5: Solve for x
    x = 81,158,719,853.85/289,590.56
  6. Step 6: Final answer
    x = 280,253.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.