Home / 390,333.15-538,660.62-218,257.34

Finding the Fourth Proportional to 390,333.15, 538,660.62 and 218,257.34

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Solution

The fourth proportional to 390,333.15, 538,660.62 and 218,257.34 is: 301,195.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,333.15 : 538,660.62 = 218,257.34 : x
  2. Step 2: Convert to fraction form
    390,333.15/538,660.62 = 218,257.34/x
  3. Step 3: Cross multiply
    390,333.15x = 538,660.62 × 218,257.34
  4. Step 4: Simplify right side
    390,333.15x = 117,566,631,390.65
  5. Step 5: Solve for x
    x = 117,566,631,390.65/390,333.15
  6. Step 6: Final answer
    x = 301,195.61

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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.