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Finding the Fourth Proportional to 354,465.47, 531,781.41 and 217,840.85

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Solution

The fourth proportional to 354,465.47, 531,781.41 and 217,840.85 is: 326,812.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,465.47 : 531,781.41 = 217,840.85 : x
  2. Step 2: Convert to fraction form
    354,465.47/531,781.41 = 217,840.85/x
  3. Step 3: Cross multiply
    354,465.47x = 531,781.41 × 217,840.85
  4. Step 4: Simplify right side
    354,465.47x = 115,843,711,709.69
  5. Step 5: Solve for x
    x = 115,843,711,709.69/354,465.47
  6. Step 6: Final answer
    x = 326,812.41

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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.