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Finding the Fourth Proportional to 683.95, 1,027.44 and 424.15

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Solution

The fourth proportional to 683.95, 1,027.44 and 424.15 is: 637.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.95 : 1,027.44 = 424.15 : x
  2. Step 2: Convert to fraction form
    683.95/1,027.44 = 424.15/x
  3. Step 3: Cross multiply
    683.95x = 1,027.44 × 424.15
  4. Step 4: Simplify right side
    683.95x = 435,788.68
  5. Step 5: Solve for x
    x = 435,788.68/683.95
  6. Step 6: Final answer
    x = 637.16

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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.