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Finding the Fourth Proportional to 378,362.18, 522,118.89 and 217,206.68

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Solution

The fourth proportional to 378,362.18, 522,118.89 and 217,206.68 is: 299,733.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,362.18 : 522,118.89 = 217,206.68 : x
  2. Step 2: Convert to fraction form
    378,362.18/522,118.89 = 217,206.68/x
  3. Step 3: Cross multiply
    378,362.18x = 522,118.89 × 217,206.68
  4. Step 4: Simplify right side
    378,362.18x = 113,407,708,051.59
  5. Step 5: Solve for x
    x = 113,407,708,051.59/378,362.18
  6. Step 6: Final answer
    x = 299,733.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.