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Finding the Fourth Proportional to 1,097.62, 1,515.24 and 678.22

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Solution

The fourth proportional to 1,097.62, 1,515.24 and 678.22 is: 936.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.62 : 1,515.24 = 678.22 : x
  2. Step 2: Convert to fraction form
    1,097.62/1,515.24 = 678.22/x
  3. Step 3: Cross multiply
    1,097.62x = 1,515.24 × 678.22
  4. Step 4: Simplify right side
    1,097.62x = 1,027,659.79
  5. Step 5: Solve for x
    x = 1,027,659.79/1,097.62
  6. Step 6: Final answer
    x = 936.26

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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.