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Finding the Fourth Proportional to 651.40, 975.31 and 455.99

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Solution

The fourth proportional to 651.40, 975.31 and 455.99 is: 682.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.40 : 975.31 = 455.99 : x
  2. Step 2: Convert to fraction form
    651.40/975.31 = 455.99/x
  3. Step 3: Cross multiply
    651.40x = 975.31 × 455.99
  4. Step 4: Simplify right side
    651.40x = 444,731.61
  5. Step 5: Solve for x
    x = 444,731.61/651.40
  6. Step 6: Final answer
    x = 682.73

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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.