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Finding the Fourth Proportional to 445.93, 665 and 435.45

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Solution

The fourth proportional to 445.93, 665 and 435.45 is: 649.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.93 : 665 = 435.45 : x
  2. Step 2: Convert to fraction form
    445.93/665 = 435.45/x
  3. Step 3: Cross multiply
    445.93x = 665 × 435.45
  4. Step 4: Simplify right side
    445.93x = 289,574.25
  5. Step 5: Solve for x
    x = 289,574.25/445.93
  6. Step 6: Final answer
    x = 649.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.