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Finding the Fourth Proportional to 651.86, 977.83 and 189.64

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Solution

The fourth proportional to 651.86, 977.83 and 189.64 is: 284.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.86 : 977.83 = 189.64 : x
  2. Step 2: Convert to fraction form
    651.86/977.83 = 189.64/x
  3. Step 3: Cross multiply
    651.86x = 977.83 × 189.64
  4. Step 4: Simplify right side
    651.86x = 185,432.76
  5. Step 5: Solve for x
    x = 185,432.76/651.86
  6. Step 6: Final answer
    x = 284.47

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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.