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Finding the Fourth Proportional to 390,279.99, 585,419.97 and 109,797.24

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Solution

The fourth proportional to 390,279.99, 585,419.97 and 109,797.24 is: 164,695.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,279.99 : 585,419.97 = 109,797.24 : x
  2. Step 2: Convert to fraction form
    390,279.99/585,419.97 = 109,797.24/x
  3. Step 3: Cross multiply
    390,279.99x = 585,419.97 × 109,797.24
  4. Step 4: Simplify right side
    390,279.99x = 64,277,496,946.88
  5. Step 5: Solve for x
    x = 64,277,496,946.88/390,279.99
  6. Step 6: Final answer
    x = 164,695.86

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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.