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Finding the Fourth Proportional to 817.15, 1,225.42 and 297.01

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Solution

The fourth proportional to 817.15, 1,225.42 and 297.01 is: 445.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.15 : 1,225.42 = 297.01 : x
  2. Step 2: Convert to fraction form
    817.15/1,225.42 = 297.01/x
  3. Step 3: Cross multiply
    817.15x = 1,225.42 × 297.01
  4. Step 4: Simplify right side
    817.15x = 363,961.99
  5. Step 5: Solve for x
    x = 363,961.99/817.15
  6. Step 6: Final answer
    x = 445.40

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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.