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Finding the Fourth Proportional to 445.79, 615.14 and 259.31

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Solution

The fourth proportional to 445.79, 615.14 and 259.31 is: 357.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.79 : 615.14 = 259.31 : x
  2. Step 2: Convert to fraction form
    445.79/615.14 = 259.31/x
  3. Step 3: Cross multiply
    445.79x = 615.14 × 259.31
  4. Step 4: Simplify right side
    445.79x = 159,514.63
  5. Step 5: Solve for x
    x = 159,514.63/445.79
  6. Step 6: Final answer
    x = 357.82

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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.