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Finding the Fourth Proportional to 473.86, 653.99 and 287.47

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Solution

The fourth proportional to 473.86, 653.99 and 287.47 is: 396.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.86 : 653.99 = 287.47 : x
  2. Step 2: Convert to fraction form
    473.86/653.99 = 287.47/x
  3. Step 3: Cross multiply
    473.86x = 653.99 × 287.47
  4. Step 4: Simplify right side
    473.86x = 188,002.51
  5. Step 5: Solve for x
    x = 188,002.51/473.86
  6. Step 6: Final answer
    x = 396.75

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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.