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Finding the Fourth Proportional to 290,423.35, 399,362.92 and 252,115.94

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Solution

The fourth proportional to 290,423.35, 399,362.92 and 252,115.94 is: 346,686.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,423.35 : 399,362.92 = 252,115.94 : x
  2. Step 2: Convert to fraction form
    290,423.35/399,362.92 = 252,115.94/x
  3. Step 3: Cross multiply
    290,423.35x = 399,362.92 × 252,115.94
  4. Step 4: Simplify right side
    290,423.35x = 100,685,755,349.84
  5. Step 5: Solve for x
    x = 100,685,755,349.84/290,423.35
  6. Step 6: Final answer
    x = 346,686.16

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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.