Home / 1,320.25-1,980.38-346.33

Finding the Fourth Proportional to 1,320.25, 1,980.38 and 346.33

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Solution

The fourth proportional to 1,320.25, 1,980.38 and 346.33 is: 519.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.25 : 1,980.38 = 346.33 : x
  2. Step 2: Convert to fraction form
    1,320.25/1,980.38 = 346.33/x
  3. Step 3: Cross multiply
    1,320.25x = 1,980.38 × 346.33
  4. Step 4: Simplify right side
    1,320.25x = 685,865.01
  5. Step 5: Solve for x
    x = 685,865.01/1,320.25
  6. Step 6: Final answer
    x = 519.50

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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.