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Finding the Fourth Proportional to 553.30, 828.86 and 309.08

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Solution

The fourth proportional to 553.30, 828.86 and 309.08 is: 463.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.30 : 828.86 = 309.08 : x
  2. Step 2: Convert to fraction form
    553.30/828.86 = 309.08/x
  3. Step 3: Cross multiply
    553.30x = 828.86 × 309.08
  4. Step 4: Simplify right side
    553.30x = 256,184.05
  5. Step 5: Solve for x
    x = 256,184.05/553.30
  6. Step 6: Final answer
    x = 463.01

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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.