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Finding the Fourth Proportional to 851.17, 1,277.01 and 303.28

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Solution

The fourth proportional to 851.17, 1,277.01 and 303.28 is: 455.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.17 : 1,277.01 = 303.28 : x
  2. Step 2: Convert to fraction form
    851.17/1,277.01 = 303.28/x
  3. Step 3: Cross multiply
    851.17x = 1,277.01 × 303.28
  4. Step 4: Simplify right side
    851.17x = 387,288.74
  5. Step 5: Solve for x
    x = 387,288.74/851.17
  6. Step 6: Final answer
    x = 455.01

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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.