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Finding the Fourth Proportional to 1,021.46, 1,532.19 and 328.19

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Solution

The fourth proportional to 1,021.46, 1,532.19 and 328.19 is: 492.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.46 : 1,532.19 = 328.19 : x
  2. Step 2: Convert to fraction form
    1,021.46/1,532.19 = 328.19/x
  3. Step 3: Cross multiply
    1,021.46x = 1,532.19 × 328.19
  4. Step 4: Simplify right side
    1,021.46x = 502,842.08
  5. Step 5: Solve for x
    x = 502,842.08/1,021.46
  6. Step 6: Final answer
    x = 492.28

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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.