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Finding the Fourth Proportional to 1,574.26, 2,359.55 and 648.63

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Solution

The fourth proportional to 1,574.26, 2,359.55 and 648.63 is: 972.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,574.26 : 2,359.55 = 648.63 : x
  2. Step 2: Convert to fraction form
    1,574.26/2,359.55 = 648.63/x
  3. Step 3: Cross multiply
    1,574.26x = 2,359.55 × 648.63
  4. Step 4: Simplify right side
    1,574.26x = 1,530,476.54
  5. Step 5: Solve for x
    x = 1,530,476.54/1,574.26
  6. Step 6: Final answer
    x = 972.19

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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.