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Finding the Fourth Proportional to 620,616.70, 930,925.05 and 408,040.30

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Solution

The fourth proportional to 620,616.70, 930,925.05 and 408,040.30 is: 612,060.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,616.70 : 930,925.05 = 408,040.30 : x
  2. Step 2: Convert to fraction form
    620,616.70/930,925.05 = 408,040.30/x
  3. Step 3: Cross multiply
    620,616.70x = 930,925.05 × 408,040.30
  4. Step 4: Simplify right side
    620,616.70x = 379,854,936,679.52
  5. Step 5: Solve for x
    x = 379,854,936,679.52/620,616.70
  6. Step 6: Final answer
    x = 612,060.45

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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.