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Finding the Fourth Proportional to 390,054.29, 585,052.27 and 140,736.29

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Solution

The fourth proportional to 390,054.29, 585,052.27 and 140,736.29 is: 211,093.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,054.29 : 585,052.27 = 140,736.29 : x
  2. Step 2: Convert to fraction form
    390,054.29/585,052.27 = 140,736.29/x
  3. Step 3: Cross multiply
    390,054.29x = 585,052.27 × 140,736.29
  4. Step 4: Simplify right side
    390,054.29x = 82,338,082,658.78
  5. Step 5: Solve for x
    x = 82,338,082,658.78/390,054.29
  6. Step 6: Final answer
    x = 211,093.91

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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.