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Finding the Fourth Proportional to 339,717.28, 509,587.44 and 90,399.52

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Solution

The fourth proportional to 339,717.28, 509,587.44 and 90,399.52 is: 135,602.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,717.28 : 509,587.44 = 90,399.52 : x
  2. Step 2: Convert to fraction form
    339,717.28/509,587.44 = 90,399.52/x
  3. Step 3: Cross multiply
    339,717.28x = 509,587.44 × 90,399.52
  4. Step 4: Simplify right side
    339,717.28x = 46,066,459,974.03
  5. Step 5: Solve for x
    x = 46,066,459,974.03/339,717.28
  6. Step 6: Final answer
    x = 135,602.35

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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.