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Finding the Fourth Proportional to 1,645.35, 2,468.00 and 412.76

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Solution

The fourth proportional to 1,645.35, 2,468.00 and 412.76 is: 619.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.35 : 2,468.00 = 412.76 : x
  2. Step 2: Convert to fraction form
    1,645.35/2,468.00 = 412.76/x
  3. Step 3: Cross multiply
    1,645.35x = 2,468.00 × 412.76
  4. Step 4: Simplify right side
    1,645.35x = 1,018,677.28
  5. Step 5: Solve for x
    x = 1,018,677.28/1,645.35
  6. Step 6: Final answer
    x = 619.12

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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.