Home / 1,575.19-2,170.55-1,218.95

Finding the Fourth Proportional to 1,575.19, 2,170.55 and 1,218.95

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Solution

The fourth proportional to 1,575.19, 2,170.55 and 1,218.95 is: 1,679.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.19 : 2,170.55 = 1,218.95 : x
  2. Step 2: Convert to fraction form
    1,575.19/2,170.55 = 1,218.95/x
  3. Step 3: Cross multiply
    1,575.19x = 2,170.55 × 1,218.95
  4. Step 4: Simplify right side
    1,575.19x = 2,645,791.92
  5. Step 5: Solve for x
    x = 2,645,791.92/1,575.19
  6. Step 6: Final answer
    x = 1,679.67

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Half scale
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Double scale
Find fourth proportional to 1,576.19, 2,171.93 and 1,219.95
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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.