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Finding the Fourth Proportional to 476, 713.64 and 259.28

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Solution

The fourth proportional to 476, 713.64 and 259.28 is: 388.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    476 : 713.64 = 259.28 : x
  2. Step 2: Convert to fraction form
    476/713.64 = 259.28/x
  3. Step 3: Cross multiply
    476x = 713.64 × 259.28
  4. Step 4: Simplify right side
    476x = 185,032.58
  5. Step 5: Solve for x
    x = 185,032.58/476
  6. Step 6: Final answer
    x = 388.72

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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.