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Finding the Fourth Proportional to 789.34, 1,188.64 and 585.36

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Solution

The fourth proportional to 789.34, 1,188.64 and 585.36 is: 881.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.34 : 1,188.64 = 585.36 : x
  2. Step 2: Convert to fraction form
    789.34/1,188.64 = 585.36/x
  3. Step 3: Cross multiply
    789.34x = 1,188.64 × 585.36
  4. Step 4: Simplify right side
    789.34x = 695,782.31
  5. Step 5: Solve for x
    x = 695,782.31/789.34
  6. Step 6: Final answer
    x = 881.47

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.