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Finding the Fourth Proportional to 518.81, 713.59 and 488.84

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Solution

The fourth proportional to 518.81, 713.59 and 488.84 is: 672.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.81 : 713.59 = 488.84 : x
  2. Step 2: Convert to fraction form
    518.81/713.59 = 488.84/x
  3. Step 3: Cross multiply
    518.81x = 713.59 × 488.84
  4. Step 4: Simplify right side
    518.81x = 348,826.55
  5. Step 5: Solve for x
    x = 348,826.55/518.81
  6. Step 6: Final answer
    x = 672.37

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1.5x scale

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.