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Finding the Fourth Proportional to 328,064.20, 491,405.10 and 265,856.20

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Solution

The fourth proportional to 328,064.20, 491,405.10 and 265,856.20 is: 398,224.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,064.20 : 491,405.10 = 265,856.20 : x
  2. Step 2: Convert to fraction form
    328,064.20/491,405.10 = 265,856.20/x
  3. Step 3: Cross multiply
    328,064.20x = 491,405.10 × 265,856.20
  4. Step 4: Simplify right side
    328,064.20x = 130,643,092,546.62
  5. Step 5: Solve for x
    x = 130,643,092,546.62/328,064.20
  6. Step 6: Final answer
    x = 398,224.17

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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.