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Finding the Fourth Proportional to 404,305.13, 558,120.42 and 261,135

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Solution

The fourth proportional to 404,305.13, 558,120.42 and 261,135 is: 360,482.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,305.13 : 558,120.42 = 261,135 : x
  2. Step 2: Convert to fraction form
    404,305.13/558,120.42 = 261,135/x
  3. Step 3: Cross multiply
    404,305.13x = 558,120.42 × 261,135
  4. Step 4: Simplify right side
    404,305.13x = 145,744,775,876.70
  5. Step 5: Solve for x
    x = 145,744,775,876.70/404,305.13
  6. Step 6: Final answer
    x = 360,482.13

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1.5x scale

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.