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Finding the Fourth Proportional to 620,620.70, 930,931.05 and 408,044.30

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Solution

The fourth proportional to 620,620.70, 930,931.05 and 408,044.30 is: 612,066.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,620.70 : 930,931.05 = 408,044.30 : x
  2. Step 2: Convert to fraction form
    620,620.70/930,931.05 = 408,044.30/x
  3. Step 3: Cross multiply
    620,620.70x = 930,931.05 × 408,044.30
  4. Step 4: Simplify right side
    620,620.70x = 379,861,108,645.52
  5. Step 5: Solve for x
    x = 379,861,108,645.52/620,620.70
  6. Step 6: Final answer
    x = 612,066.45

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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.