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Finding the Fourth Proportional to 788.32, 1,181.52 and 499.84

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Solution

The fourth proportional to 788.32, 1,181.52 and 499.84 is: 749.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.32 : 1,181.52 = 499.84 : x
  2. Step 2: Convert to fraction form
    788.32/1,181.52 = 499.84/x
  3. Step 3: Cross multiply
    788.32x = 1,181.52 × 499.84
  4. Step 4: Simplify right side
    788.32x = 590,570.96
  5. Step 5: Solve for x
    x = 590,570.96/788.32
  6. Step 6: Final answer
    x = 749.15

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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.