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Finding the Fourth Proportional to 904.98, 1,357.53 and 255.72

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Solution

The fourth proportional to 904.98, 1,357.53 and 255.72 is: 383.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.98 : 1,357.53 = 255.72 : x
  2. Step 2: Convert to fraction form
    904.98/1,357.53 = 255.72/x
  3. Step 3: Cross multiply
    904.98x = 1,357.53 × 255.72
  4. Step 4: Simplify right side
    904.98x = 347,147.57
  5. Step 5: Solve for x
    x = 347,147.57/904.98
  6. Step 6: Final answer
    x = 383.60

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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.