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Finding the Fourth Proportional to 869.61, 1,304.43 and 356.25

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Solution

The fourth proportional to 869.61, 1,304.43 and 356.25 is: 534.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.61 : 1,304.43 = 356.25 : x
  2. Step 2: Convert to fraction form
    869.61/1,304.43 = 356.25/x
  3. Step 3: Cross multiply
    869.61x = 1,304.43 × 356.25
  4. Step 4: Simplify right side
    869.61x = 464,703.19
  5. Step 5: Solve for x
    x = 464,703.19/869.61
  6. Step 6: Final answer
    x = 534.38

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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.