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Finding the Fourth Proportional to 1,079.82, 1,619.72 and 310.32

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Solution

The fourth proportional to 1,079.82, 1,619.72 and 310.32 is: 465.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.82 : 1,619.72 = 310.32 : x
  2. Step 2: Convert to fraction form
    1,079.82/1,619.72 = 310.32/x
  3. Step 3: Cross multiply
    1,079.82x = 1,619.72 × 310.32
  4. Step 4: Simplify right side
    1,079.82x = 502,631.51
  5. Step 5: Solve for x
    x = 502,631.51/1,079.82
  6. Step 6: Final answer
    x = 465.48

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Double scale
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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.