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Finding the Fourth Proportional to 821.26, 1,133.38 and 472.06

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Solution

The fourth proportional to 821.26, 1,133.38 and 472.06 is: 651.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.26 : 1,133.38 = 472.06 : x
  2. Step 2: Convert to fraction form
    821.26/1,133.38 = 472.06/x
  3. Step 3: Cross multiply
    821.26x = 1,133.38 × 472.06
  4. Step 4: Simplify right side
    821.26x = 535,023.36
  5. Step 5: Solve for x
    x = 535,023.36/821.26
  6. Step 6: Final answer
    x = 651.47

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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.