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Finding the Fourth Proportional to 548,968.50, 757,403.91 and 307,212.66

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Solution

The fourth proportional to 548,968.50, 757,403.91 and 307,212.66 is: 423,856.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,968.50 : 757,403.91 = 307,212.66 : x
  2. Step 2: Convert to fraction form
    548,968.50/757,403.91 = 307,212.66/x
  3. Step 3: Cross multiply
    548,968.50x = 757,403.91 × 307,212.66
  4. Step 4: Simplify right side
    548,968.50x = 232,684,070,242.95
  5. Step 5: Solve for x
    x = 232,684,070,242.95/548,968.50
  6. Step 6: Final answer
    x = 423,856.87

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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.