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Finding the Fourth Proportional to 817.12, 1,225.84 and 304.16

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Solution

The fourth proportional to 817.12, 1,225.84 and 304.16 is: 456.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.12 : 1,225.84 = 304.16 : x
  2. Step 2: Convert to fraction form
    817.12/1,225.84 = 304.16/x
  3. Step 3: Cross multiply
    817.12x = 1,225.84 × 304.16
  4. Step 4: Simplify right side
    817.12x = 372,851.49
  5. Step 5: Solve for x
    x = 372,851.49/817.12
  6. Step 6: Final answer
    x = 456.30

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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.