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Finding the Fourth Proportional to 621,326, 930,801.68 and 520,767.74

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Solution

The fourth proportional to 621,326, 930,801.68 and 520,767.74 is: 780,156.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,326 : 930,801.68 = 520,767.74 : x
  2. Step 2: Convert to fraction form
    621,326/930,801.68 = 520,767.74/x
  3. Step 3: Cross multiply
    621,326x = 930,801.68 × 520,767.74
  4. Step 4: Simplify right side
    621,326x = 484,731,484,677.97
  5. Step 5: Solve for x
    x = 484,731,484,677.97/621,326
  6. Step 6: Final answer
    x = 780,156.45

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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.