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Finding the Fourth Proportional to 570.81, 787.99 and 361.02

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Solution

The fourth proportional to 570.81, 787.99 and 361.02 is: 498.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.81 : 787.99 = 361.02 : x
  2. Step 2: Convert to fraction form
    570.81/787.99 = 361.02/x
  3. Step 3: Cross multiply
    570.81x = 787.99 × 361.02
  4. Step 4: Simplify right side
    570.81x = 284,480.15
  5. Step 5: Solve for x
    x = 284,480.15/570.81
  6. Step 6: Final answer
    x = 498.38

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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.