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Finding the Fourth Proportional to 621,366.82, 857,478.05 and 349,434.63

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Solution

The fourth proportional to 621,366.82, 857,478.05 and 349,434.63 is: 482,215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,366.82 : 857,478.05 = 349,434.63 : x
  2. Step 2: Convert to fraction form
    621,366.82/857,478.05 = 349,434.63/x
  3. Step 3: Cross multiply
    621,366.82x = 857,478.05 × 349,434.63
  4. Step 4: Simplify right side
    621,366.82x = 299,632,525,531.39
  5. Step 5: Solve for x
    x = 299,632,525,531.39/621,366.82
  6. Step 6: Final answer
    x = 482,215.20

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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.