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Finding the Fourth Proportional to 426,956.08, 640,411.02 and 216,588.56

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Solution

The fourth proportional to 426,956.08, 640,411.02 and 216,588.56 is: 324,871.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,956.08 : 640,411.02 = 216,588.56 : x
  2. Step 2: Convert to fraction form
    426,956.08/640,411.02 = 216,588.56/x
  3. Step 3: Cross multiply
    426,956.08x = 640,411.02 × 216,588.56
  4. Step 4: Simplify right side
    426,956.08x = 138,705,700,629.93
  5. Step 5: Solve for x
    x = 138,705,700,629.93/426,956.08
  6. Step 6: Final answer
    x = 324,871.12

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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.