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Finding the Fourth Proportional to 651.53, 976.47 and 520.99

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Solution

The fourth proportional to 651.53, 976.47 and 520.99 is: 780.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.53 : 976.47 = 520.99 : x
  2. Step 2: Convert to fraction form
    651.53/976.47 = 520.99/x
  3. Step 3: Cross multiply
    651.53x = 976.47 × 520.99
  4. Step 4: Simplify right side
    651.53x = 508,731.11
  5. Step 5: Solve for x
    x = 508,731.11/651.53
  6. Step 6: Final answer
    x = 780.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.