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Finding the Fourth Proportional to 445.85, 615.12 and 259.28

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Solution

The fourth proportional to 445.85, 615.12 and 259.28 is: 357.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.85 : 615.12 = 259.28 : x
  2. Step 2: Convert to fraction form
    445.85/615.12 = 259.28/x
  3. Step 3: Cross multiply
    445.85x = 615.12 × 259.28
  4. Step 4: Simplify right side
    445.85x = 159,485.57
  5. Step 5: Solve for x
    x = 159,485.57/445.85
  6. Step 6: Final answer
    x = 357.71

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Double scale
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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.