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Finding the Fourth Proportional to 651.21, 977.55 and 342.99

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Solution

The fourth proportional to 651.21, 977.55 and 342.99 is: 514.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.21 : 977.55 = 342.99 : x
  2. Step 2: Convert to fraction form
    651.21/977.55 = 342.99/x
  3. Step 3: Cross multiply
    651.21x = 977.55 × 342.99
  4. Step 4: Simplify right side
    651.21x = 335,289.87
  5. Step 5: Solve for x
    x = 335,289.87/651.21
  6. Step 6: Final answer
    x = 514.87

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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.