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Finding the Fourth Proportional to 310,064.20, 427,935.40 and 189,275.80

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Solution

The fourth proportional to 310,064.20, 427,935.40 and 189,275.80 is: 261,229.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,064.20 : 427,935.40 = 189,275.80 : x
  2. Step 2: Convert to fraction form
    310,064.20/427,935.40 = 189,275.80/x
  3. Step 3: Cross multiply
    310,064.20x = 427,935.40 × 189,275.80
  4. Step 4: Simplify right side
    310,064.20x = 80,997,815,183.32
  5. Step 5: Solve for x
    x = 80,997,815,183.32/310,064.20
  6. Step 6: Final answer
    x = 261,229.18

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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.