Home / 1,110.09-1,531.90-612.70

Finding the Fourth Proportional to 1,110.09, 1,531.90 and 612.70

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Solution

The fourth proportional to 1,110.09, 1,531.90 and 612.70 is: 845.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.09 : 1,531.90 = 612.70 : x
  2. Step 2: Convert to fraction form
    1,110.09/1,531.90 = 612.70/x
  3. Step 3: Cross multiply
    1,110.09x = 1,531.90 × 612.70
  4. Step 4: Simplify right side
    1,110.09x = 938,595.13
  5. Step 5: Solve for x
    x = 938,595.13/1,110.09
  6. Step 6: Final answer
    x = 845.51

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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.