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Finding the Fourth Proportional to 450,321.71, 621,342.21 and 268,998.15

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Solution

The fourth proportional to 450,321.71, 621,342.21 and 268,998.15 is: 371,156.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,321.71 : 621,342.21 = 268,998.15 : x
  2. Step 2: Convert to fraction form
    450,321.71/621,342.21 = 268,998.15/x
  3. Step 3: Cross multiply
    450,321.71x = 621,342.21 × 268,998.15
  4. Step 4: Simplify right side
    450,321.71x = 167,139,905,006.91
  5. Step 5: Solve for x
    x = 167,139,905,006.91/450,321.71
  6. Step 6: Final answer
    x = 371,156.67

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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.