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Finding the Fourth Proportional to 473.44, 653.76 and 318.64

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Solution

The fourth proportional to 473.44, 653.76 and 318.64 is: 440.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.44 : 653.76 = 318.64 : x
  2. Step 2: Convert to fraction form
    473.44/653.76 = 318.64/x
  3. Step 3: Cross multiply
    473.44x = 653.76 × 318.64
  4. Step 4: Simplify right side
    473.44x = 208,314.09
  5. Step 5: Solve for x
    x = 208,314.09/473.44
  6. Step 6: Final answer
    x = 440.00

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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.