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Finding the Fourth Proportional to 434.85, 651.44 and 290.25

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Solution

The fourth proportional to 434.85, 651.44 and 290.25 is: 434.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.85 : 651.44 = 290.25 : x
  2. Step 2: Convert to fraction form
    434.85/651.44 = 290.25/x
  3. Step 3: Cross multiply
    434.85x = 651.44 × 290.25
  4. Step 4: Simplify right side
    434.85x = 189,079.01
  5. Step 5: Solve for x
    x = 189,079.01/434.85
  6. Step 6: Final answer
    x = 434.81

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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.