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Finding the Fourth Proportional to 571.77, 787.01 and 488.61

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Solution

The fourth proportional to 571.77, 787.01 and 488.61 is: 672.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.77 : 787.01 = 488.61 : x
  2. Step 2: Convert to fraction form
    571.77/787.01 = 488.61/x
  3. Step 3: Cross multiply
    571.77x = 787.01 × 488.61
  4. Step 4: Simplify right side
    571.77x = 384,538.51
  5. Step 5: Solve for x
    x = 384,538.51/571.77
  6. Step 6: Final answer
    x = 672.54

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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.