Home / 1,289.56-1,924.97-1,108.12

Finding the Fourth Proportional to 1,289.56, 1,924.97 and 1,108.12

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Solution

The fourth proportional to 1,289.56, 1,924.97 and 1,108.12 is: 1,654.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.56 : 1,924.97 = 1,108.12 : x
  2. Step 2: Convert to fraction form
    1,289.56/1,924.97 = 1,108.12/x
  3. Step 3: Cross multiply
    1,289.56x = 1,924.97 × 1,108.12
  4. Step 4: Simplify right side
    1,289.56x = 2,133,097.76
  5. Step 5: Solve for x
    x = 2,133,097.76/1,289.56
  6. Step 6: Final answer
    x = 1,654.13

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.