Home / 1,245.35-1,868.43-424.15

Finding the Fourth Proportional to 1,245.35, 1,868.43 and 424.15

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Solution

The fourth proportional to 1,245.35, 1,868.43 and 424.15 is: 636.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.35 : 1,868.43 = 424.15 : x
  2. Step 2: Convert to fraction form
    1,245.35/1,868.43 = 424.15/x
  3. Step 3: Cross multiply
    1,245.35x = 1,868.43 × 424.15
  4. Step 4: Simplify right side
    1,245.35x = 792,494.58
  5. Step 5: Solve for x
    x = 792,494.58/1,245.35
  6. Step 6: Final answer
    x = 636.36

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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.