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Finding the Fourth Proportional to 651.56, 976.72 and 407.50

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Solution

The fourth proportional to 651.56, 976.72 and 407.50 is: 610.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.56 : 976.72 = 407.50 : x
  2. Step 2: Convert to fraction form
    651.56/976.72 = 407.50/x
  3. Step 3: Cross multiply
    651.56x = 976.72 × 407.50
  4. Step 4: Simplify right side
    651.56x = 398,013.40
  5. Step 5: Solve for x
    x = 398,013.40/651.56
  6. Step 6: Final answer
    x = 610.86

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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.