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Finding the Fourth Proportional to 390,494.93, 585,755.27 and 134,324.92

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Solution

The fourth proportional to 390,494.93, 585,755.27 and 134,324.92 is: 201,491.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,494.93 : 585,755.27 = 134,324.92 : x
  2. Step 2: Convert to fraction form
    390,494.93/585,755.27 = 134,324.92/x
  3. Step 3: Cross multiply
    390,494.93x = 585,755.27 × 134,324.92
  4. Step 4: Simplify right side
    390,494.93x = 78,681,529,782.33
  5. Step 5: Solve for x
    x = 78,681,529,782.33/390,494.93
  6. Step 6: Final answer
    x = 201,491.81

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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.