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Finding the Fourth Proportional to 621,328, 930,804.67 and 520,769.74

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Solution

The fourth proportional to 621,328, 930,804.67 and 520,769.74 is: 780,159.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,328 : 930,804.67 = 520,769.74 : x
  2. Step 2: Convert to fraction form
    621,328/930,804.67 = 520,769.74/x
  3. Step 3: Cross multiply
    621,328x = 930,804.67 × 520,769.74
  4. Step 4: Simplify right side
    621,328x = 484,734,905,986.69
  5. Step 5: Solve for x
    x = 484,734,905,986.69/621,328
  6. Step 6: Final answer
    x = 780,159.44

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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.