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Finding the Fourth Proportional to 520.51, 718.33 and 310.62

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Solution

The fourth proportional to 520.51, 718.33 and 310.62 is: 428.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.51 : 718.33 = 310.62 : x
  2. Step 2: Convert to fraction form
    520.51/718.33 = 310.62/x
  3. Step 3: Cross multiply
    520.51x = 718.33 × 310.62
  4. Step 4: Simplify right side
    520.51x = 223,127.66
  5. Step 5: Solve for x
    x = 223,127.66/520.51
  6. Step 6: Final answer
    x = 428.67

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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.