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Finding the Fourth Proportional to 435.57, 653.32 and 218.98

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Solution

The fourth proportional to 435.57, 653.32 and 218.98 is: 328.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.57 : 653.32 = 218.98 : x
  2. Step 2: Convert to fraction form
    435.57/653.32 = 218.98/x
  3. Step 3: Cross multiply
    435.57x = 653.32 × 218.98
  4. Step 4: Simplify right side
    435.57x = 143,064.01
  5. Step 5: Solve for x
    x = 143,064.01/435.57
  6. Step 6: Final answer
    x = 328.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.