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Finding the Fourth Proportional to 262,145.40, 392,634.90 and 215,489.40

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Solution

The fourth proportional to 262,145.40, 392,634.90 and 215,489.40 is: 322,754.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,145.40 : 392,634.90 = 215,489.40 : x
  2. Step 2: Convert to fraction form
    262,145.40/392,634.90 = 215,489.40/x
  3. Step 3: Cross multiply
    262,145.40x = 392,634.90 × 215,489.40
  4. Step 4: Simplify right side
    262,145.40x = 84,608,659,020.06
  5. Step 5: Solve for x
    x = 84,608,659,020.06/262,145.40
  6. Step 6: Final answer
    x = 322,754.70

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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.