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Finding the Fourth Proportional to 285,778.22, 428,690.64 and 143,550.32

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Solution

The fourth proportional to 285,778.22, 428,690.64 and 143,550.32 is: 215,337.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,778.22 : 428,690.64 = 143,550.32 : x
  2. Step 2: Convert to fraction form
    285,778.22/428,690.64 = 143,550.32/x
  3. Step 3: Cross multiply
    285,778.22x = 428,690.64 × 143,550.32
  4. Step 4: Simplify right side
    285,778.22x = 61,538,678,553.00
  5. Step 5: Solve for x
    x = 61,538,678,553.00/285,778.22
  6. Step 6: Final answer
    x = 215,337.19

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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.