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Finding the Fourth Proportional to 445.86, 615.30 and 259.35

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Solution

The fourth proportional to 445.86, 615.30 and 259.35 is: 357.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.86 : 615.30 = 259.35 : x
  2. Step 2: Convert to fraction form
    445.86/615.30 = 259.35/x
  3. Step 3: Cross multiply
    445.86x = 615.30 × 259.35
  4. Step 4: Simplify right side
    445.86x = 159,578.06
  5. Step 5: Solve for x
    x = 159,578.06/445.86
  6. Step 6: Final answer
    x = 357.91

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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.