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Finding the Fourth Proportional to 670,608.60, 1,005,912.90 and 221,398.80

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Solution

The fourth proportional to 670,608.60, 1,005,912.90 and 221,398.80 is: 332,098.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,608.60 : 1,005,912.90 = 221,398.80 : x
  2. Step 2: Convert to fraction form
    670,608.60/1,005,912.90 = 221,398.80/x
  3. Step 3: Cross multiply
    670,608.60x = 1,005,912.90 × 221,398.80
  4. Step 4: Simplify right side
    670,608.60x = 222,707,908,964.52
  5. Step 5: Solve for x
    x = 222,707,908,964.52/670,608.60
  6. Step 6: Final answer
    x = 332,098.20

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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.