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Finding the Fourth Proportional to 1,055.41, 1,583.12 and 325

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Solution

The fourth proportional to 1,055.41, 1,583.12 and 325 is: 487.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.41 : 1,583.12 = 325 : x
  2. Step 2: Convert to fraction form
    1,055.41/1,583.12 = 325/x
  3. Step 3: Cross multiply
    1,055.41x = 1,583.12 × 325
  4. Step 4: Simplify right side
    1,055.41x = 514,514.00
  5. Step 5: Solve for x
    x = 514,514.00/1,055.41
  6. Step 6: Final answer
    x = 487.50

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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.