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Finding the Fourth Proportional to 285,523.20, 428,284.80 and 259,279.20

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Solution

The fourth proportional to 285,523.20, 428,284.80 and 259,279.20 is: 388,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,523.20 : 428,284.80 = 259,279.20 : x
  2. Step 2: Convert to fraction form
    285,523.20/428,284.80 = 259,279.20/x
  3. Step 3: Cross multiply
    285,523.20x = 428,284.80 × 259,279.20
  4. Step 4: Simplify right side
    285,523.20x = 111,045,340,316.16
  5. Step 5: Solve for x
    x = 111,045,340,316.16/285,523.20
  6. Step 6: Final answer
    x = 388,918.80

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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.