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Finding the Fourth Proportional to 387,919.44, 535,340.88 and 218,162.88

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Solution

The fourth proportional to 387,919.44, 535,340.88 and 218,162.88 is: 301,071.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,919.44 : 535,340.88 = 218,162.88 : x
  2. Step 2: Convert to fraction form
    387,919.44/535,340.88 = 218,162.88/x
  3. Step 3: Cross multiply
    387,919.44x = 535,340.88 × 218,162.88
  4. Step 4: Simplify right side
    387,919.44x = 116,791,508,162.53
  5. Step 5: Solve for x
    x = 116,791,508,162.53/387,919.44
  6. Step 6: Final answer
    x = 301,071.55

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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.