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Finding the Fourth Proportional to 704.33, 972 and 389.60

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Solution

The fourth proportional to 704.33, 972 and 389.60 is: 537.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.33 : 972 = 389.60 : x
  2. Step 2: Convert to fraction form
    704.33/972 = 389.60/x
  3. Step 3: Cross multiply
    704.33x = 972 × 389.60
  4. Step 4: Simplify right side
    704.33x = 378,693.63
  5. Step 5: Solve for x
    x = 378,693.63/704.33
  6. Step 6: Final answer
    x = 537.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.