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Finding the Fourth Proportional to 310,906.32, 466,360.20 and 86,278.80

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Solution

The fourth proportional to 310,906.32, 466,360.20 and 86,278.80 is: 129,418.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,906.32 : 466,360.20 = 86,278.80 : x
  2. Step 2: Convert to fraction form
    310,906.32/466,360.20 = 86,278.80/x
  3. Step 3: Cross multiply
    310,906.32x = 466,360.20 × 86,278.80
  4. Step 4: Simplify right side
    310,906.32x = 40,236,998,423.76
  5. Step 5: Solve for x
    x = 40,236,998,423.76/310,906.32
  6. Step 6: Final answer
    x = 129,418.40

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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.