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Finding the Fourth Proportional to 515,568.76, 773,438.79 and 216,071.87

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Solution

The fourth proportional to 515,568.76, 773,438.79 and 216,071.87 is: 324,143.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,568.76 : 773,438.79 = 216,071.87 : x
  2. Step 2: Convert to fraction form
    515,568.76/773,438.79 = 216,071.87/x
  3. Step 3: Cross multiply
    515,568.76x = 773,438.79 × 216,071.87
  4. Step 4: Simplify right side
    515,568.76x = 167,118,365,685.84
  5. Step 5: Solve for x
    x = 167,118,365,685.84/515,568.76
  6. Step 6: Final answer
    x = 324,143.70

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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.