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Finding the Fourth Proportional to 651.54, 977.92 and 445.60

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Solution

The fourth proportional to 651.54, 977.92 and 445.60 is: 668.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.54 : 977.92 = 445.60 : x
  2. Step 2: Convert to fraction form
    651.54/977.92 = 445.60/x
  3. Step 3: Cross multiply
    651.54x = 977.92 × 445.60
  4. Step 4: Simplify right side
    651.54x = 435,763.77
  5. Step 5: Solve for x
    x = 435,763.77/651.54
  6. Step 6: Final answer
    x = 668.82

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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.