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Finding the Fourth Proportional to 351,701.55, 485,293.26 and 208,438.47

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Solution

The fourth proportional to 351,701.55, 485,293.26 and 208,438.47 is: 287,612.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,701.55 : 485,293.26 = 208,438.47 : x
  2. Step 2: Convert to fraction form
    351,701.55/485,293.26 = 208,438.47/x
  3. Step 3: Cross multiply
    351,701.55x = 485,293.26 × 208,438.47
  4. Step 4: Simplify right side
    351,701.55x = 101,153,784,615.71
  5. Step 5: Solve for x
    x = 101,153,784,615.71/351,701.55
  6. Step 6: Final answer
    x = 287,612.56

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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.