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Finding the Fourth Proportional to 520.88, 718.60 and 313.84

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Solution

The fourth proportional to 520.88, 718.60 and 313.84 is: 432.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.88 : 718.60 = 313.84 : x
  2. Step 2: Convert to fraction form
    520.88/718.60 = 313.84/x
  3. Step 3: Cross multiply
    520.88x = 718.60 × 313.84
  4. Step 4: Simplify right side
    520.88x = 225,525.42
  5. Step 5: Solve for x
    x = 225,525.42/520.88
  6. Step 6: Final answer
    x = 432.97

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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.