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Finding the Fourth Proportional to 290,826.70, 408,090.50 and 290,826.70

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Solution

The fourth proportional to 290,826.70, 408,090.50 and 290,826.70 is: 408,090.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,826.70 : 408,090.50 = 290,826.70 : x
  2. Step 2: Convert to fraction form
    290,826.70/408,090.50 = 290,826.70/x
  3. Step 3: Cross multiply
    290,826.70x = 408,090.50 × 290,826.70
  4. Step 4: Simplify right side
    290,826.70x = 118,683,613,416.35
  5. Step 5: Solve for x
    x = 118,683,613,416.35/290,826.70
  6. Step 6: Final answer
    x = 408,090.50

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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.