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Finding the Fourth Proportional to 953.41, 1,315.31 and 580.09

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Solution

The fourth proportional to 953.41, 1,315.31 and 580.09 is: 800.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.41 : 1,315.31 = 580.09 : x
  2. Step 2: Convert to fraction form
    953.41/1,315.31 = 580.09/x
  3. Step 3: Cross multiply
    953.41x = 1,315.31 × 580.09
  4. Step 4: Simplify right side
    953.41x = 762,996.34
  5. Step 5: Solve for x
    x = 762,996.34/953.41
  6. Step 6: Final answer
    x = 800.28

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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.