Home / 1,451.40-2,002.92-788.22

Finding the Fourth Proportional to 1,451.40, 2,002.92 and 788.22

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Solution

The fourth proportional to 1,451.40, 2,002.92 and 788.22 is: 1,087.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.40 : 2,002.92 = 788.22 : x
  2. Step 2: Convert to fraction form
    1,451.40/2,002.92 = 788.22/x
  3. Step 3: Cross multiply
    1,451.40x = 2,002.92 × 788.22
  4. Step 4: Simplify right side
    1,451.40x = 1,578,741.60
  5. Step 5: Solve for x
    x = 1,578,741.60/1,451.40
  6. Step 6: Final answer
    x = 1,087.74

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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.