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Finding the Fourth Proportional to 651.77, 976.90 and 359.45

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Solution

The fourth proportional to 651.77, 976.90 and 359.45 is: 538.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.77 : 976.90 = 359.45 : x
  2. Step 2: Convert to fraction form
    651.77/976.90 = 359.45/x
  3. Step 3: Cross multiply
    651.77x = 976.90 × 359.45
  4. Step 4: Simplify right side
    651.77x = 351,146.13
  5. Step 5: Solve for x
    x = 351,146.13/651.77
  6. Step 6: Final answer
    x = 538.76

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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.