Home / 1,330.14-1,995.24-405.66

Finding the Fourth Proportional to 1,330.14, 1,995.24 and 405.66

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Solution

The fourth proportional to 1,330.14, 1,995.24 and 405.66 is: 608.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.14 : 1,995.24 = 405.66 : x
  2. Step 2: Convert to fraction form
    1,330.14/1,995.24 = 405.66/x
  3. Step 3: Cross multiply
    1,330.14x = 1,995.24 × 405.66
  4. Step 4: Simplify right side
    1,330.14x = 809,389.06
  5. Step 5: Solve for x
    x = 809,389.06/1,330.14
  6. Step 6: Final answer
    x = 608.50

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Double scale
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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.