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Finding the Fourth Proportional to 1,090.63, 1,636.62 and 432.82

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Solution

The fourth proportional to 1,090.63, 1,636.62 and 432.82 is: 649.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.63 : 1,636.62 = 432.82 : x
  2. Step 2: Convert to fraction form
    1,090.63/1,636.62 = 432.82/x
  3. Step 3: Cross multiply
    1,090.63x = 1,636.62 × 432.82
  4. Step 4: Simplify right side
    1,090.63x = 708,361.87
  5. Step 5: Solve for x
    x = 708,361.87/1,090.63
  6. Step 6: Final answer
    x = 649.50

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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.