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Finding the Fourth Proportional to 621,329, 930,806.17 and 520,770.74

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Solution

The fourth proportional to 621,329, 930,806.17 and 520,770.74 is: 780,160.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,329 : 930,806.17 = 520,770.74 : x
  2. Step 2: Convert to fraction form
    621,329/930,806.17 = 520,770.74/x
  3. Step 3: Cross multiply
    621,329x = 930,806.17 × 520,770.74
  4. Step 4: Simplify right side
    621,329x = 484,736,617,947.47
  5. Step 5: Solve for x
    x = 484,736,617,947.47/621,329
  6. Step 6: Final answer
    x = 780,160.94

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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.