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Finding the Fourth Proportional to 621,699.64, 857,920.50 and 349,772.92

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Solution

The fourth proportional to 621,699.64, 857,920.50 and 349,772.92 is: 482,672.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,699.64 : 857,920.50 = 349,772.92 : x
  2. Step 2: Convert to fraction form
    621,699.64/857,920.50 = 349,772.92/x
  3. Step 3: Cross multiply
    621,699.64x = 857,920.50 × 349,772.92
  4. Step 4: Simplify right side
    621,699.64x = 300,077,358,412.86
  5. Step 5: Solve for x
    x = 300,077,358,412.86/621,699.64
  6. Step 6: Final answer
    x = 482,672.56

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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.