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Finding the Fourth Proportional to 390,622.72, 585,852 and 110,064.64

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Solution

The fourth proportional to 390,622.72, 585,852 and 110,064.64 is: 165,073.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,622.72 : 585,852 = 110,064.64 : x
  2. Step 2: Convert to fraction form
    390,622.72/585,852 = 110,064.64/x
  3. Step 3: Cross multiply
    390,622.72x = 585,852 × 110,064.64
  4. Step 4: Simplify right side
    390,622.72x = 64,481,589,473.28
  5. Step 5: Solve for x
    x = 64,481,589,473.28/390,622.72
  6. Step 6: Final answer
    x = 165,073.83

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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.