Home / 387,719.40-535,054.41-217,942.68

Finding the Fourth Proportional to 387,719.40, 535,054.41 and 217,942.68

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Solution

The fourth proportional to 387,719.40, 535,054.41 and 217,942.68 is: 300,761.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,719.40 : 535,054.41 = 217,942.68 : x
  2. Step 2: Convert to fraction form
    387,719.40/535,054.41 = 217,942.68/x
  3. Step 3: Cross multiply
    387,719.40x = 535,054.41 × 217,942.68
  4. Step 4: Simplify right side
    387,719.40x = 116,611,192,061.22
  5. Step 5: Solve for x
    x = 116,611,192,061.22/387,719.40
  6. Step 6: Final answer
    x = 300,761.82

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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.