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Finding the Fourth Proportional to 351,730.82, 485,397.50 and 215,839.82

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Solution

The fourth proportional to 351,730.82, 485,397.50 and 215,839.82 is: 297,864.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,730.82 : 485,397.50 = 215,839.82 : x
  2. Step 2: Convert to fraction form
    351,730.82/485,397.50 = 215,839.82/x
  3. Step 3: Cross multiply
    351,730.82x = 485,397.50 × 215,839.82
  4. Step 4: Simplify right side
    351,730.82x = 104,768,109,162.75
  5. Step 5: Solve for x
    x = 104,768,109,162.75/351,730.82
  6. Step 6: Final answer
    x = 297,864.45

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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.