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Finding the Fourth Proportional to 879.36, 1,213.38 and 585.03

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Solution

The fourth proportional to 879.36, 1,213.38 and 585.03 is: 807.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.36 : 1,213.38 = 585.03 : x
  2. Step 2: Convert to fraction form
    879.36/1,213.38 = 585.03/x
  3. Step 3: Cross multiply
    879.36x = 1,213.38 × 585.03
  4. Step 4: Simplify right side
    879.36x = 709,863.70
  5. Step 5: Solve for x
    x = 709,863.70/879.36
  6. Step 6: Final answer
    x = 807.25

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.