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Finding the Fourth Proportional to 310,632.36, 465,949.18 and 85,993.48

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Solution

The fourth proportional to 310,632.36, 465,949.18 and 85,993.48 is: 128,990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,632.36 : 465,949.18 = 85,993.48 : x
  2. Step 2: Convert to fraction form
    310,632.36/465,949.18 = 85,993.48/x
  3. Step 3: Cross multiply
    310,632.36x = 465,949.18 × 85,993.48
  4. Step 4: Simplify right side
    310,632.36x = 40,068,591,491.35
  5. Step 5: Solve for x
    x = 40,068,591,491.35/310,632.36
  6. Step 6: Final answer
    x = 128,990.40

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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.