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Finding the Fourth Proportional to 904.72, 1,357.08 and 255.50

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Solution

The fourth proportional to 904.72, 1,357.08 and 255.50 is: 383.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.72 : 1,357.08 = 255.50 : x
  2. Step 2: Convert to fraction form
    904.72/1,357.08 = 255.50/x
  3. Step 3: Cross multiply
    904.72x = 1,357.08 × 255.50
  4. Step 4: Simplify right side
    904.72x = 346,733.94
  5. Step 5: Solve for x
    x = 346,733.94/904.72
  6. Step 6: Final answer
    x = 383.25

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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.