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Finding the Fourth Proportional to 1,009.13, 1,513.69 and 325.13

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Solution

The fourth proportional to 1,009.13, 1,513.69 and 325.13 is: 487.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009.13 : 1,513.69 = 325.13 : x
  2. Step 2: Convert to fraction form
    1,009.13/1,513.69 = 325.13/x
  3. Step 3: Cross multiply
    1,009.13x = 1,513.69 × 325.13
  4. Step 4: Simplify right side
    1,009.13x = 492,137.65
  5. Step 5: Solve for x
    x = 492,137.65/1,009.13
  6. Step 6: Final answer
    x = 487.69

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Double scale
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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.