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Finding the Fourth Proportional to 829.96, 1,145.22 and 498.32

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Solution

The fourth proportional to 829.96, 1,145.22 and 498.32 is: 687.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.96 : 1,145.22 = 498.32 : x
  2. Step 2: Convert to fraction form
    829.96/1,145.22 = 498.32/x
  3. Step 3: Cross multiply
    829.96x = 1,145.22 × 498.32
  4. Step 4: Simplify right side
    829.96x = 570,686.03
  5. Step 5: Solve for x
    x = 570,686.03/829.96
  6. Step 6: Final answer
    x = 687.61

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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.