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Finding the Fourth Proportional to 390,162.71, 585,244.06 and 109,679.96

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Solution

The fourth proportional to 390,162.71, 585,244.06 and 109,679.96 is: 164,519.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,162.71 : 585,244.06 = 109,679.96 : x
  2. Step 2: Convert to fraction form
    390,162.71/585,244.06 = 109,679.96/x
  3. Step 3: Cross multiply
    390,162.71x = 585,244.06 × 109,679.96
  4. Step 4: Simplify right side
    390,162.71x = 64,189,542,164.82
  5. Step 5: Solve for x
    x = 64,189,542,164.82/390,162.71
  6. Step 6: Final answer
    x = 164,519.93

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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.