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Finding the Fourth Proportional to 620,621.70, 930,932.55 and 408,045.30

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Solution

The fourth proportional to 620,621.70, 930,932.55 and 408,045.30 is: 612,067.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,621.70 : 930,932.55 = 408,045.30 : x
  2. Step 2: Convert to fraction form
    620,621.70/930,932.55 = 408,045.30/x
  3. Step 3: Cross multiply
    620,621.70x = 930,932.55 × 408,045.30
  4. Step 4: Simplify right side
    620,621.70x = 379,862,651,644.52
  5. Step 5: Solve for x
    x = 379,862,651,644.52/620,621.70
  6. Step 6: Final answer
    x = 612,067.95

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1.5x scale

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.