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Finding the Fourth Proportional to 255.56, 383.34 and 207.50

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Solution

The fourth proportional to 255.56, 383.34 and 207.50 is: 311.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.56 : 383.34 = 207.50 : x
  2. Step 2: Convert to fraction form
    255.56/383.34 = 207.50/x
  3. Step 3: Cross multiply
    255.56x = 383.34 × 207.50
  4. Step 4: Simplify right side
    255.56x = 79,543.05
  5. Step 5: Solve for x
    x = 79,543.05/255.56
  6. Step 6: Final answer
    x = 311.25

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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.