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Finding the Fourth Proportional to 621,367.82, 857,479.42 and 349,435.63

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Solution

The fourth proportional to 621,367.82, 857,479.42 and 349,435.63 is: 482,216.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,367.82 : 857,479.42 = 349,435.63 : x
  2. Step 2: Convert to fraction form
    621,367.82/857,479.42 = 349,435.63/x
  3. Step 3: Cross multiply
    621,367.82x = 857,479.42 × 349,435.63
  4. Step 4: Simplify right side
    621,367.82x = 299,633,861,339.74
  5. Step 5: Solve for x
    x = 299,633,861,339.74/621,367.82
  6. Step 6: Final answer
    x = 482,216.57

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1.5x scale

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.