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Finding the Fourth Proportional to 1,314.93, 1,971.33 and 492.75

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Solution

The fourth proportional to 1,314.93, 1,971.33 and 492.75 is: 738.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314.93 : 1,971.33 = 492.75 : x
  2. Step 2: Convert to fraction form
    1,314.93/1,971.33 = 492.75/x
  3. Step 3: Cross multiply
    1,314.93x = 1,971.33 × 492.75
  4. Step 4: Simplify right side
    1,314.93x = 971,372.86
  5. Step 5: Solve for x
    x = 971,372.86/1,314.93
  6. Step 6: Final answer
    x = 738.73

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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.