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Finding the Fourth Proportional to 835.87, 1,153.62 and 486.67

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Solution

The fourth proportional to 835.87, 1,153.62 and 486.67 is: 671.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.87 : 1,153.62 = 486.67 : x
  2. Step 2: Convert to fraction form
    835.87/1,153.62 = 486.67/x
  3. Step 3: Cross multiply
    835.87x = 1,153.62 × 486.67
  4. Step 4: Simplify right side
    835.87x = 561,432.25
  5. Step 5: Solve for x
    x = 561,432.25/835.87
  6. Step 6: Final answer
    x = 671.67

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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.