Home / 1,094.20-1,641.36-391.12

Finding the Fourth Proportional to 1,094.20, 1,641.36 and 391.12

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Solution

The fourth proportional to 1,094.20, 1,641.36 and 391.12 is: 586.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,094.20 : 1,641.36 = 391.12 : x
  2. Step 2: Convert to fraction form
    1,094.20/1,641.36 = 391.12/x
  3. Step 3: Cross multiply
    1,094.20x = 1,641.36 × 391.12
  4. Step 4: Simplify right side
    1,094.20x = 641,968.72
  5. Step 5: Solve for x
    x = 641,968.72/1,094.20
  6. Step 6: Final answer
    x = 586.70

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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.