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Finding the Fourth Proportional to 1,404.56, 2,107.24 and 430.80

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Solution

The fourth proportional to 1,404.56, 2,107.24 and 430.80 is: 646.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,404.56 : 2,107.24 = 430.80 : x
  2. Step 2: Convert to fraction form
    1,404.56/2,107.24 = 430.80/x
  3. Step 3: Cross multiply
    1,404.56x = 2,107.24 × 430.80
  4. Step 4: Simplify right side
    1,404.56x = 907,796.84
  5. Step 5: Solve for x
    x = 907,796.84/1,404.56
  6. Step 6: Final answer
    x = 646.32

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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.