Home / 1,719.03-2,578.55-420.50

Finding the Fourth Proportional to 1,719.03, 2,578.55 and 420.50

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Solution

The fourth proportional to 1,719.03, 2,578.55 and 420.50 is: 630.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.03 : 2,578.55 = 420.50 : x
  2. Step 2: Convert to fraction form
    1,719.03/2,578.55 = 420.50/x
  3. Step 3: Cross multiply
    1,719.03x = 2,578.55 × 420.50
  4. Step 4: Simplify right side
    1,719.03x = 1,084,284.62
  5. Step 5: Solve for x
    x = 1,084,284.62/1,719.03
  6. Step 6: Final answer
    x = 630.75

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Double scale
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Similar ratio
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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.