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Finding the Fourth Proportional to 587.30, 879.81 and 455.63

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Solution

The fourth proportional to 587.30, 879.81 and 455.63 is: 682.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.30 : 879.81 = 455.63 : x
  2. Step 2: Convert to fraction form
    587.30/879.81 = 455.63/x
  3. Step 3: Cross multiply
    587.30x = 879.81 × 455.63
  4. Step 4: Simplify right side
    587.30x = 400,864.29
  5. Step 5: Solve for x
    x = 400,864.29/587.30
  6. Step 6: Final answer
    x = 682.55

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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.