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Finding the Fourth Proportional to 405,645.70, 608,468.55 and 264,640.90

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Solution

The fourth proportional to 405,645.70, 608,468.55 and 264,640.90 is: 396,961.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,645.70 : 608,468.55 = 264,640.90 : x
  2. Step 2: Convert to fraction form
    405,645.70/608,468.55 = 264,640.90/x
  3. Step 3: Cross multiply
    405,645.70x = 608,468.55 × 264,640.90
  4. Step 4: Simplify right side
    405,645.70x = 161,025,664,693.70
  5. Step 5: Solve for x
    x = 161,025,664,693.70/405,645.70
  6. Step 6: Final answer
    x = 396,961.35

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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.