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Finding the Fourth Proportional to 856.59, 1,181.89 and 483.57

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Solution

The fourth proportional to 856.59, 1,181.89 and 483.57 is: 667.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.59 : 1,181.89 = 483.57 : x
  2. Step 2: Convert to fraction form
    856.59/1,181.89 = 483.57/x
  3. Step 3: Cross multiply
    856.59x = 1,181.89 × 483.57
  4. Step 4: Simplify right side
    856.59x = 571,526.55
  5. Step 5: Solve for x
    x = 571,526.55/856.59
  6. Step 6: Final answer
    x = 667.21

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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.