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Finding the Fourth Proportional to 473.21, 653.12 and 276.77

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Solution

The fourth proportional to 473.21, 653.12 and 276.77 is: 381.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.21 : 653.12 = 276.77 : x
  2. Step 2: Convert to fraction form
    473.21/653.12 = 276.77/x
  3. Step 3: Cross multiply
    473.21x = 653.12 × 276.77
  4. Step 4: Simplify right side
    473.21x = 180,760.76
  5. Step 5: Solve for x
    x = 180,760.76/473.21
  6. Step 6: Final answer
    x = 381.99

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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.