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Finding the Fourth Proportional to 893.18, 1,340.06 and 424.85

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Solution

The fourth proportional to 893.18, 1,340.06 and 424.85 is: 637.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.18 : 1,340.06 = 424.85 : x
  2. Step 2: Convert to fraction form
    893.18/1,340.06 = 424.85/x
  3. Step 3: Cross multiply
    893.18x = 1,340.06 × 424.85
  4. Step 4: Simplify right side
    893.18x = 569,324.49
  5. Step 5: Solve for x
    x = 569,324.49/893.18
  6. Step 6: Final answer
    x = 637.41

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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.