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Finding the Fourth Proportional to 520.85, 718.74 and 373.73

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Solution

The fourth proportional to 520.85, 718.74 and 373.73 is: 515.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.85 : 718.74 = 373.73 : x
  2. Step 2: Convert to fraction form
    520.85/718.74 = 373.73/x
  3. Step 3: Cross multiply
    520.85x = 718.74 × 373.73
  4. Step 4: Simplify right side
    520.85x = 268,611.11
  5. Step 5: Solve for x
    x = 268,611.11/520.85
  6. Step 6: Final answer
    x = 515.72

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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.