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Finding the Fourth Proportional to 524.45, 722.65 and 488

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Solution

The fourth proportional to 524.45, 722.65 and 488 is: 672.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.45 : 722.65 = 488 : x
  2. Step 2: Convert to fraction form
    524.45/722.65 = 488/x
  3. Step 3: Cross multiply
    524.45x = 722.65 × 488
  4. Step 4: Simplify right side
    524.45x = 352,653.20
  5. Step 5: Solve for x
    x = 352,653.20/524.45
  6. Step 6: Final answer
    x = 672.42

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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.