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Finding the Fourth Proportional to 1,453.26, 2,005.47 and 790.13

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Solution

The fourth proportional to 1,453.26, 2,005.47 and 790.13 is: 1,090.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,453.26 : 2,005.47 = 790.13 : x
  2. Step 2: Convert to fraction form
    1,453.26/2,005.47 = 790.13/x
  3. Step 3: Cross multiply
    1,453.26x = 2,005.47 × 790.13
  4. Step 4: Simplify right side
    1,453.26x = 1,584,571.98
  5. Step 5: Solve for x
    x = 1,584,571.98/1,453.26
  6. Step 6: Final answer
    x = 1,090.36

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.