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Finding the Fourth Proportional to 621,280.83, 930,703.32 and 321,957.75

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Solution

The fourth proportional to 621,280.83, 930,703.32 and 321,957.75 is: 482,305.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,280.83 : 930,703.32 = 321,957.75 : x
  2. Step 2: Convert to fraction form
    621,280.83/930,703.32 = 321,957.75/x
  3. Step 3: Cross multiply
    621,280.83x = 930,703.32 × 321,957.75
  4. Step 4: Simplify right side
    621,280.83x = 299,647,146,824.73
  5. Step 5: Solve for x
    x = 299,647,146,824.73/621,280.83
  6. Step 6: Final answer
    x = 482,305.48

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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.