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Finding the Fourth Proportional to 571.04, 787.36 and 492.64

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Solution

The fourth proportional to 571.04, 787.36 and 492.64 is: 679.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.04 : 787.36 = 492.64 : x
  2. Step 2: Convert to fraction form
    571.04/787.36 = 492.64/x
  3. Step 3: Cross multiply
    571.04x = 787.36 × 492.64
  4. Step 4: Simplify right side
    571.04x = 387,885.03
  5. Step 5: Solve for x
    x = 387,885.03/571.04
  6. Step 6: Final answer
    x = 679.26

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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.