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Finding the Fourth Proportional to 55.37, 76.20 and 51.00

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Solution

The fourth proportional to 55.37, 76.20 and 51.00 is: 70.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.37 : 76.20 = 51.00 : x
  2. Step 2: Convert to fraction form
    55.37/76.20 = 51.00/x
  3. Step 3: Cross multiply
    55.37x = 76.20 × 51.00
  4. Step 4: Simplify right side
    55.37x = 3,885.82
  5. Step 5: Solve for x
    x = 3,885.82/55.37
  6. Step 6: Final answer
    x = 70.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.