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Finding the Fourth Proportional to 1,404.50, 2,106.75 and 538.84

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Solution

The fourth proportional to 1,404.50, 2,106.75 and 538.84 is: 808.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,404.50 : 2,106.75 = 538.84 : x
  2. Step 2: Convert to fraction form
    1,404.50/2,106.75 = 538.84/x
  3. Step 3: Cross multiply
    1,404.50x = 2,106.75 × 538.84
  4. Step 4: Simplify right side
    1,404.50x = 1,135,201.17
  5. Step 5: Solve for x
    x = 1,135,201.17/1,404.50
  6. Step 6: Final answer
    x = 808.26

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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.