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Finding the Fourth Proportional to 1,636.79, 2,455.16 and 404.19

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Solution

The fourth proportional to 1,636.79, 2,455.16 and 404.19 is: 606.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.79 : 2,455.16 = 404.19 : x
  2. Step 2: Convert to fraction form
    1,636.79/2,455.16 = 404.19/x
  3. Step 3: Cross multiply
    1,636.79x = 2,455.16 × 404.19
  4. Step 4: Simplify right side
    1,636.79x = 992,349.10
  5. Step 5: Solve for x
    x = 992,349.10/1,636.79
  6. Step 6: Final answer
    x = 606.28

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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.