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Finding the Fourth Proportional to 398,980.80, 550,473.57 and 262,965.87

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Solution

The fourth proportional to 398,980.80, 550,473.57 and 262,965.87 is: 362,813.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,980.80 : 550,473.57 = 262,965.87 : x
  2. Step 2: Convert to fraction form
    398,980.80/550,473.57 = 262,965.87/x
  3. Step 3: Cross multiply
    398,980.80x = 550,473.57 × 262,965.87
  4. Step 4: Simplify right side
    398,980.80x = 144,755,761,247.06
  5. Step 5: Solve for x
    x = 144,755,761,247.06/398,980.80
  6. Step 6: Final answer
    x = 362,813.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.