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Finding the Fourth Proportional to 621,376.70, 931,770.54 and 216,427.68

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Solution

The fourth proportional to 621,376.70, 931,770.54 and 216,427.68 is: 324,538.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,376.70 : 931,770.54 = 216,427.68 : x
  2. Step 2: Convert to fraction form
    621,376.70/931,770.54 = 216,427.68/x
  3. Step 3: Cross multiply
    621,376.70x = 931,770.54 × 216,427.68
  4. Step 4: Simplify right side
    621,376.70x = 201,660,936,264.55
  5. Step 5: Solve for x
    x = 201,660,936,264.55/621,376.70
  6. Step 6: Final answer
    x = 324,538.94

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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.