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Finding the Fourth Proportional to 1,356.21, 2,034.29 and 625.79

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Solution

The fourth proportional to 1,356.21, 2,034.29 and 625.79 is: 938.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.21 : 2,034.29 = 625.79 : x
  2. Step 2: Convert to fraction form
    1,356.21/2,034.29 = 625.79/x
  3. Step 3: Cross multiply
    1,356.21x = 2,034.29 × 625.79
  4. Step 4: Simplify right side
    1,356.21x = 1,273,038.34
  5. Step 5: Solve for x
    x = 1,273,038.34/1,356.21
  6. Step 6: Final answer
    x = 938.67

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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.