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Finding the Fourth Proportional to 515,818.52, 773,478.92 and 216,218.66

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Solution

The fourth proportional to 515,818.52, 773,478.92 and 216,218.66 is: 324,223.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,818.52 : 773,478.92 = 216,218.66 : x
  2. Step 2: Convert to fraction form
    515,818.52/773,478.92 = 216,218.66/x
  3. Step 3: Cross multiply
    515,818.52x = 773,478.92 × 216,218.66
  4. Step 4: Simplify right side
    515,818.52x = 167,240,570,672.16
  5. Step 5: Solve for x
    x = 167,240,570,672.16/515,818.52
  6. Step 6: Final answer
    x = 324,223.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.