Home / 1,420.26-2,130.38-394.26

Finding the Fourth Proportional to 1,420.26, 2,130.38 and 394.26

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Solution

The fourth proportional to 1,420.26, 2,130.38 and 394.26 is: 591.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.26 : 2,130.38 = 394.26 : x
  2. Step 2: Convert to fraction form
    1,420.26/2,130.38 = 394.26/x
  3. Step 3: Cross multiply
    1,420.26x = 2,130.38 × 394.26
  4. Step 4: Simplify right side
    1,420.26x = 839,923.62
  5. Step 5: Solve for x
    x = 839,923.62/1,420.26
  6. Step 6: Final answer
    x = 591.39

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Half scale
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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.