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Finding the Fourth Proportional to 587.48, 808.88 and 447.15

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Solution

The fourth proportional to 587.48, 808.88 and 447.15 is: 615.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.48 : 808.88 = 447.15 : x
  2. Step 2: Convert to fraction form
    587.48/808.88 = 447.15/x
  3. Step 3: Cross multiply
    587.48x = 808.88 × 447.15
  4. Step 4: Simplify right side
    587.48x = 361,688.46
  5. Step 5: Solve for x
    x = 361,688.46/587.48
  6. Step 6: Final answer
    x = 615.66

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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.