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Finding the Fourth Proportional to 1,025.83, 1,538.74 and 256.33

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Solution

The fourth proportional to 1,025.83, 1,538.74 and 256.33 is: 384.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.83 : 1,538.74 = 256.33 : x
  2. Step 2: Convert to fraction form
    1,025.83/1,538.74 = 256.33/x
  3. Step 3: Cross multiply
    1,025.83x = 1,538.74 × 256.33
  4. Step 4: Simplify right side
    1,025.83x = 394,422.02
  5. Step 5: Solve for x
    x = 394,422.02/1,025.83
  6. Step 6: Final answer
    x = 384.49

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Half scale
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Double scale
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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.