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Finding the Fourth Proportional to 473.43, 653.64 and 305.45

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Solution

The fourth proportional to 473.43, 653.64 and 305.45 is: 421.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.43 : 653.64 = 305.45 : x
  2. Step 2: Convert to fraction form
    473.43/653.64 = 305.45/x
  3. Step 3: Cross multiply
    473.43x = 653.64 × 305.45
  4. Step 4: Simplify right side
    473.43x = 199,656.05
  5. Step 5: Solve for x
    x = 199,656.05/473.43
  6. Step 6: Final answer
    x = 421.72

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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.