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Finding the Fourth Proportional to 310,229.12, 465,258.48 and 85,536.80

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Solution

The fourth proportional to 310,229.12, 465,258.48 and 85,536.80 is: 128,281.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,229.12 : 465,258.48 = 85,536.80 : x
  2. Step 2: Convert to fraction form
    310,229.12/465,258.48 = 85,536.80/x
  3. Step 3: Cross multiply
    310,229.12x = 465,258.48 × 85,536.80
  4. Step 4: Simplify right side
    310,229.12x = 39,796,721,552.06
  5. Step 5: Solve for x
    x = 39,796,721,552.06/310,229.12
  6. Step 6: Final answer
    x = 128,281.71

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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.