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Finding the Fourth Proportional to 473.56, 653.66 and 318.31

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Solution

The fourth proportional to 473.56, 653.66 and 318.31 is: 439.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.56 : 653.66 = 318.31 : x
  2. Step 2: Convert to fraction form
    473.56/653.66 = 318.31/x
  3. Step 3: Cross multiply
    473.56x = 653.66 × 318.31
  4. Step 4: Simplify right side
    473.56x = 208,066.51
  5. Step 5: Solve for x
    x = 208,066.51/473.56
  6. Step 6: Final answer
    x = 439.37

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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.