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Finding the Fourth Proportional to 621,367.32, 857,478.74 and 349,435.13

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Solution

The fourth proportional to 621,367.32, 857,478.74 and 349,435.13 is: 482,215.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,367.32 : 857,478.74 = 349,435.13 : x
  2. Step 2: Convert to fraction form
    621,367.32/857,478.74 = 349,435.13/x
  3. Step 3: Cross multiply
    621,367.32x = 857,478.74 × 349,435.13
  4. Step 4: Simplify right side
    621,367.32x = 299,633,194,984.14
  5. Step 5: Solve for x
    x = 299,633,194,984.14/621,367.32
  6. Step 6: Final answer
    x = 482,215.89

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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.