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Finding the Fourth Proportional to 822.69, 1,135.42 and 473.38

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Solution

The fourth proportional to 822.69, 1,135.42 and 473.38 is: 653.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.69 : 1,135.42 = 473.38 : x
  2. Step 2: Convert to fraction form
    822.69/1,135.42 = 473.38/x
  3. Step 3: Cross multiply
    822.69x = 1,135.42 × 473.38
  4. Step 4: Simplify right side
    822.69x = 537,481.10
  5. Step 5: Solve for x
    x = 537,481.10/822.69
  6. Step 6: Final answer
    x = 653.32

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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.