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Finding the Fourth Proportional to 651.61, 977.82 and 286.57

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Solution

The fourth proportional to 651.61, 977.82 and 286.57 is: 430.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.61 : 977.82 = 286.57 : x
  2. Step 2: Convert to fraction form
    651.61/977.82 = 286.57/x
  3. Step 3: Cross multiply
    651.61x = 977.82 × 286.57
  4. Step 4: Simplify right side
    651.61x = 280,213.88
  5. Step 5: Solve for x
    x = 280,213.88/651.61
  6. Step 6: Final answer
    x = 430.03

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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.