Home / 1,438.12-2,157.50-788.52

Finding the Fourth Proportional to 1,438.12, 2,157.50 and 788.52

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Solution

The fourth proportional to 1,438.12, 2,157.50 and 788.52 is: 1,182.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.12 : 2,157.50 = 788.52 : x
  2. Step 2: Convert to fraction form
    1,438.12/2,157.50 = 788.52/x
  3. Step 3: Cross multiply
    1,438.12x = 2,157.50 × 788.52
  4. Step 4: Simplify right side
    1,438.12x = 1,701,231.90
  5. Step 5: Solve for x
    x = 1,701,231.90/1,438.12
  6. Step 6: Final answer
    x = 1,182.96

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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.