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Finding the Fourth Proportional to 621,283.08, 930,706.70 and 321,960

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Solution

The fourth proportional to 621,283.08, 930,706.70 and 321,960 is: 482,308.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,283.08 : 930,706.70 = 321,960 : x
  2. Step 2: Convert to fraction form
    621,283.08/930,706.70 = 321,960/x
  3. Step 3: Cross multiply
    621,283.08x = 930,706.70 × 321,960
  4. Step 4: Simplify right side
    621,283.08x = 299,650,327,522.20
  5. Step 5: Solve for x
    x = 299,650,327,522.20/621,283.08
  6. Step 6: Final answer
    x = 482,308.85

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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.