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Finding the Fourth Proportional to 310,608.20, 428,123.06 and 219,847.72

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Solution

The fourth proportional to 310,608.20, 428,123.06 and 219,847.72 is: 303,024.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,608.20 : 428,123.06 = 219,847.72 : x
  2. Step 2: Convert to fraction form
    310,608.20/428,123.06 = 219,847.72/x
  3. Step 3: Cross multiply
    310,608.20x = 428,123.06 × 219,847.72
  4. Step 4: Simplify right side
    310,608.20x = 94,121,878,620.42
  5. Step 5: Solve for x
    x = 94,121,878,620.42/310,608.20
  6. Step 6: Final answer
    x = 303,024.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.