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Finding the Fourth Proportional to 280,665.40, 422,034.90 and 235,046.20

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Solution

The fourth proportional to 280,665.40, 422,034.90 and 235,046.20 is: 353,437.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,665.40 : 422,034.90 = 235,046.20 : x
  2. Step 2: Convert to fraction form
    280,665.40/422,034.90 = 235,046.20/x
  3. Step 3: Cross multiply
    280,665.40x = 422,034.90 × 235,046.20
  4. Step 4: Simplify right side
    280,665.40x = 99,197,699,512.38
  5. Step 5: Solve for x
    x = 99,197,699,512.38/280,665.40
  6. Step 6: Final answer
    x = 353,437.58

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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.