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Finding the Fourth Proportional to 327,768.60, 491,652.90 and 260,117.40

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Solution

The fourth proportional to 327,768.60, 491,652.90 and 260,117.40 is: 390,176.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,768.60 : 491,652.90 = 260,117.40 : x
  2. Step 2: Convert to fraction form
    327,768.60/491,652.90 = 260,117.40/x
  3. Step 3: Cross multiply
    327,768.60x = 491,652.90 × 260,117.40
  4. Step 4: Simplify right side
    327,768.60x = 127,887,474,050.46
  5. Step 5: Solve for x
    x = 127,887,474,050.46/327,768.60
  6. Step 6: Final answer
    x = 390,176.10

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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.