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Finding the Fourth Proportional to 436,279.20, 654,418.80 and 258,986.40

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Solution

The fourth proportional to 436,279.20, 654,418.80 and 258,986.40 is: 388,479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,279.20 : 654,418.80 = 258,986.40 : x
  2. Step 2: Convert to fraction form
    436,279.20/654,418.80 = 258,986.40/x
  3. Step 3: Cross multiply
    436,279.20x = 654,418.80 × 258,986.40
  4. Step 4: Simplify right side
    436,279.20x = 169,485,569,104.32
  5. Step 5: Solve for x
    x = 169,485,569,104.32/436,279.20
  6. Step 6: Final answer
    x = 388,479.60

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Similar ratio
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1.5x scale

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.