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Finding the Fourth Proportional to 792.64, 1,187.68 and 488

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Solution

The fourth proportional to 792.64, 1,187.68 and 488 is: 731.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.64 : 1,187.68 = 488 : x
  2. Step 2: Convert to fraction form
    792.64/1,187.68 = 488/x
  3. Step 3: Cross multiply
    792.64x = 1,187.68 × 488
  4. Step 4: Simplify right side
    792.64x = 579,587.84
  5. Step 5: Solve for x
    x = 579,587.84/792.64
  6. Step 6: Final answer
    x = 731.21

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.