Home / 1,317.09-1,975.86-451.20

Finding the Fourth Proportional to 1,317.09, 1,975.86 and 451.20

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Solution

The fourth proportional to 1,317.09, 1,975.86 and 451.20 is: 676.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.09 : 1,975.86 = 451.20 : x
  2. Step 2: Convert to fraction form
    1,317.09/1,975.86 = 451.20/x
  3. Step 3: Cross multiply
    1,317.09x = 1,975.86 × 451.20
  4. Step 4: Simplify right side
    1,317.09x = 891,498.15
  5. Step 5: Solve for x
    x = 891,498.15/1,317.09
  6. Step 6: Final answer
    x = 676.87

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1.5x scale

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.