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Finding the Fourth Proportional to 290,827.70, 408,091.90 and 290,827.70

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Solution

The fourth proportional to 290,827.70, 408,091.90 and 290,827.70 is: 408,091.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,827.70 : 408,091.90 = 290,827.70 : x
  2. Step 2: Convert to fraction form
    290,827.70/408,091.90 = 290,827.70/x
  3. Step 3: Cross multiply
    290,827.70x = 408,091.90 × 290,827.70
  4. Step 4: Simplify right side
    290,827.70x = 118,684,428,665.63
  5. Step 5: Solve for x
    x = 118,684,428,665.63/290,827.70
  6. Step 6: Final answer
    x = 408,091.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.