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Finding the Fourth Proportional to 651.32, 977.19 and 285.86

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Solution

The fourth proportional to 651.32, 977.19 and 285.86 is: 428.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.32 : 977.19 = 285.86 : x
  2. Step 2: Convert to fraction form
    651.32/977.19 = 285.86/x
  3. Step 3: Cross multiply
    651.32x = 977.19 × 285.86
  4. Step 4: Simplify right side
    651.32x = 279,339.53
  5. Step 5: Solve for x
    x = 279,339.53/651.32
  6. Step 6: Final answer
    x = 428.88

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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.