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Finding the Fourth Proportional to 651.70, 976.98 and 378.02

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Solution

The fourth proportional to 651.70, 976.98 and 378.02 is: 566.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.70 : 976.98 = 378.02 : x
  2. Step 2: Convert to fraction form
    651.70/976.98 = 378.02/x
  3. Step 3: Cross multiply
    651.70x = 976.98 × 378.02
  4. Step 4: Simplify right side
    651.70x = 369,317.98
  5. Step 5: Solve for x
    x = 369,317.98/651.70
  6. Step 6: Final answer
    x = 566.70

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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.