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Finding the Fourth Proportional to 435.98, 652.40 and 287.22

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Solution

The fourth proportional to 435.98, 652.40 and 287.22 is: 429.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.98 : 652.40 = 287.22 : x
  2. Step 2: Convert to fraction form
    435.98/652.40 = 287.22/x
  3. Step 3: Cross multiply
    435.98x = 652.40 × 287.22
  4. Step 4: Simplify right side
    435.98x = 187,384.20
  5. Step 5: Solve for x
    x = 187,384.20/435.98
  6. Step 6: Final answer
    x = 429.80

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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.