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Finding the Fourth Proportional to 390,624.72, 585,855 and 110,066.64

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Solution

The fourth proportional to 390,624.72, 585,855 and 110,066.64 is: 165,076.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,624.72 : 585,855 = 110,066.64 : x
  2. Step 2: Convert to fraction form
    390,624.72/585,855 = 110,066.64/x
  3. Step 3: Cross multiply
    390,624.72x = 585,855 × 110,066.64
  4. Step 4: Simplify right side
    390,624.72x = 64,483,091,377.20
  5. Step 5: Solve for x
    x = 64,483,091,377.20/390,624.72
  6. Step 6: Final answer
    x = 165,076.83

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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.