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Finding the Fourth Proportional to 390,107.26, 585,171.83 and 190,587.25

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Solution

The fourth proportional to 390,107.26, 585,171.83 and 190,587.25 is: 285,886.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,107.26 : 585,171.83 = 190,587.25 : x
  2. Step 2: Convert to fraction form
    390,107.26/585,171.83 = 190,587.25/x
  3. Step 3: Cross multiply
    390,107.26x = 585,171.83 × 190,587.25
  4. Step 4: Simplify right side
    390,107.26x = 111,526,291,065.10
  5. Step 5: Solve for x
    x = 111,526,291,065.10/390,107.26
  6. Step 6: Final answer
    x = 285,886.22

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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.