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Finding the Fourth Proportional to 648.20, 976.63 and 586.58

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Solution

The fourth proportional to 648.20, 976.63 and 586.58 is: 883.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.20 : 976.63 = 586.58 : x
  2. Step 2: Convert to fraction form
    648.20/976.63 = 586.58/x
  3. Step 3: Cross multiply
    648.20x = 976.63 × 586.58
  4. Step 4: Simplify right side
    648.20x = 572,871.63
  5. Step 5: Solve for x
    x = 572,871.63/648.20
  6. Step 6: Final answer
    x = 883.79

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.