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Finding the Fourth Proportional to 1,330.21, 1,995.53 and 452.76

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Solution

The fourth proportional to 1,330.21, 1,995.53 and 452.76 is: 679.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.21 : 1,995.53 = 452.76 : x
  2. Step 2: Convert to fraction form
    1,330.21/1,995.53 = 452.76/x
  3. Step 3: Cross multiply
    1,330.21x = 1,995.53 × 452.76
  4. Step 4: Simplify right side
    1,330.21x = 903,496.16
  5. Step 5: Solve for x
    x = 903,496.16/1,330.21
  6. Step 6: Final answer
    x = 679.21

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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.