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Finding the Fourth Proportional to 473.99, 653.54 and 305.51

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Solution

The fourth proportional to 473.99, 653.54 and 305.51 is: 421.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.99 : 653.54 = 305.51 : x
  2. Step 2: Convert to fraction form
    473.99/653.54 = 305.51/x
  3. Step 3: Cross multiply
    473.99x = 653.54 × 305.51
  4. Step 4: Simplify right side
    473.99x = 199,658.21
  5. Step 5: Solve for x
    x = 199,658.21/473.99
  6. Step 6: Final answer
    x = 421.23

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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.