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Finding the Fourth Proportional to 290,319.38, 435,239.31 and 128,097.94

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Solution

The fourth proportional to 290,319.38, 435,239.31 and 128,097.94 is: 192,041.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,319.38 : 435,239.31 = 128,097.94 : x
  2. Step 2: Convert to fraction form
    290,319.38/435,239.31 = 128,097.94/x
  3. Step 3: Cross multiply
    290,319.38x = 435,239.31 × 128,097.94
  4. Step 4: Simplify right side
    290,319.38x = 55,753,259,018.02
  5. Step 5: Solve for x
    x = 55,753,259,018.02/290,319.38
  6. Step 6: Final answer
    x = 192,041.12

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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.