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Finding the Fourth Proportional to 402,131.40, 603,537.30 and 165,643.80

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Solution

The fourth proportional to 402,131.40, 603,537.30 and 165,643.80 is: 248,605.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,131.40 : 603,537.30 = 165,643.80 : x
  2. Step 2: Convert to fraction form
    402,131.40/603,537.30 = 165,643.80/x
  3. Step 3: Cross multiply
    402,131.40x = 603,537.30 × 165,643.80
  4. Step 4: Simplify right side
    402,131.40x = 99,972,211,813.74
  5. Step 5: Solve for x
    x = 99,972,211,813.74/402,131.40
  6. Step 6: Final answer
    x = 248,605.83

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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.