Home / 1,316.09-1,815.45-850.34

Finding the Fourth Proportional to 1,316.09, 1,815.45 and 850.34

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Solution

The fourth proportional to 1,316.09, 1,815.45 and 850.34 is: 1,172.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.09 : 1,815.45 = 850.34 : x
  2. Step 2: Convert to fraction form
    1,316.09/1,815.45 = 850.34/x
  3. Step 3: Cross multiply
    1,316.09x = 1,815.45 × 850.34
  4. Step 4: Simplify right side
    1,316.09x = 1,543,751.10
  5. Step 5: Solve for x
    x = 1,543,751.10/1,316.09
  6. Step 6: Final answer
    x = 1,172.98

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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.