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Finding the Fourth Proportional to 1,569.33, 2,352.65 and 644.31

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Solution

The fourth proportional to 1,569.33, 2,352.65 and 644.31 is: 965.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,569.33 : 2,352.65 = 644.31 : x
  2. Step 2: Convert to fraction form
    1,569.33/2,352.65 = 644.31/x
  3. Step 3: Cross multiply
    1,569.33x = 2,352.65 × 644.31
  4. Step 4: Simplify right side
    1,569.33x = 1,515,835.12
  5. Step 5: Solve for x
    x = 1,515,835.12/1,569.33
  6. Step 6: Final answer
    x = 965.91

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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.