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Finding the Fourth Proportional to 290.08, 434.86 and 187.40

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Solution

The fourth proportional to 290.08, 434.86 and 187.40 is: 280.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.08 : 434.86 = 187.40 : x
  2. Step 2: Convert to fraction form
    290.08/434.86 = 187.40/x
  3. Step 3: Cross multiply
    290.08x = 434.86 × 187.40
  4. Step 4: Simplify right side
    290.08x = 81,492.76
  5. Step 5: Solve for x
    x = 81,492.76/290.08
  6. Step 6: Final answer
    x = 280.93

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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.