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Finding the Fourth Proportional to 447.76, 621.28 and 435

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Solution

The fourth proportional to 447.76, 621.28 and 435 is: 603.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.76 : 621.28 = 435 : x
  2. Step 2: Convert to fraction form
    447.76/621.28 = 435/x
  3. Step 3: Cross multiply
    447.76x = 621.28 × 435
  4. Step 4: Simplify right side
    447.76x = 270,255.71
  5. Step 5: Solve for x
    x = 270,255.71/447.76
  6. Step 6: Final answer
    x = 603.58

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.