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Finding the Fourth Proportional to 708.02, 1,062.02 and 419.26

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Solution

The fourth proportional to 708.02, 1,062.02 and 419.26 is: 628.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.02 : 1,062.02 = 419.26 : x
  2. Step 2: Convert to fraction form
    708.02/1,062.02 = 419.26/x
  3. Step 3: Cross multiply
    708.02x = 1,062.02 × 419.26
  4. Step 4: Simplify right side
    708.02x = 445,262.51
  5. Step 5: Solve for x
    x = 445,262.51/708.02
  6. Step 6: Final answer
    x = 628.88

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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.