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Finding the Fourth Proportional to 905.02, 1,357.41 and 255.69

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Solution

The fourth proportional to 905.02, 1,357.41 and 255.69 is: 383.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.02 : 1,357.41 = 255.69 : x
  2. Step 2: Convert to fraction form
    905.02/1,357.41 = 255.69/x
  3. Step 3: Cross multiply
    905.02x = 1,357.41 × 255.69
  4. Step 4: Simplify right side
    905.02x = 347,076.16
  5. Step 5: Solve for x
    x = 347,076.16/905.02
  6. Step 6: Final answer
    x = 383.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 906.02, 1,358.91 and 256.69
Similar ratio
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1.5x scale

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.