Home / 1,316.80-1,815.86-1,022.18

Finding the Fourth Proportional to 1,316.80, 1,815.86 and 1,022.18

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Solution

The fourth proportional to 1,316.80, 1,815.86 and 1,022.18 is: 1,409.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.80 : 1,815.86 = 1,022.18 : x
  2. Step 2: Convert to fraction form
    1,316.80/1,815.86 = 1,022.18/x
  3. Step 3: Cross multiply
    1,316.80x = 1,815.86 × 1,022.18
  4. Step 4: Simplify right side
    1,316.80x = 1,856,135.77
  5. Step 5: Solve for x
    x = 1,856,135.77/1,316.80
  6. Step 6: Final answer
    x = 1,409.58

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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.