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Finding the Fourth Proportional to 351,864.71, 485,188.16 and 261,388.52

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Solution

The fourth proportional to 351,864.71, 485,188.16 and 261,388.52 is: 360,430.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,864.71 : 485,188.16 = 261,388.52 : x
  2. Step 2: Convert to fraction form
    351,864.71/485,188.16 = 261,388.52/x
  3. Step 3: Cross multiply
    351,864.71x = 485,188.16 × 261,388.52
  4. Step 4: Simplify right side
    351,864.71x = 126,822,612,637.98
  5. Step 5: Solve for x
    x = 126,822,612,637.98/351,864.71
  6. Step 6: Final answer
    x = 360,430.05

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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.