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Finding the Fourth Proportional to 390,066.29, 585,119.49 and 109,605.41

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Solution

The fourth proportional to 390,066.29, 585,119.49 and 109,605.41 is: 164,413.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,066.29 : 585,119.49 = 109,605.41 : x
  2. Step 2: Convert to fraction form
    390,066.29/585,119.49 = 109,605.41/x
  3. Step 3: Cross multiply
    390,066.29x = 585,119.49 × 109,605.41
  4. Step 4: Simplify right side
    390,066.29x = 64,132,262,515.21
  5. Step 5: Solve for x
    x = 64,132,262,515.21/390,066.29
  6. Step 6: Final answer
    x = 164,413.75

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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.