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Finding the Fourth Proportional to 290.07, 434.14 and 187.43

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Solution

The fourth proportional to 290.07, 434.14 and 187.43 is: 280.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.07 : 434.14 = 187.43 : x
  2. Step 2: Convert to fraction form
    290.07/434.14 = 187.43/x
  3. Step 3: Cross multiply
    290.07x = 434.14 × 187.43
  4. Step 4: Simplify right side
    290.07x = 81,368.22
  5. Step 5: Solve for x
    x = 81,368.22/290.07
  6. Step 6: Final answer
    x = 280.51

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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.