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Finding the Fourth Proportional to 1,485.35, 2,228.02 and 511.46

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Solution

The fourth proportional to 1,485.35, 2,228.02 and 511.46 is: 767.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.35 : 2,228.02 = 511.46 : x
  2. Step 2: Convert to fraction form
    1,485.35/2,228.02 = 511.46/x
  3. Step 3: Cross multiply
    1,485.35x = 2,228.02 × 511.46
  4. Step 4: Simplify right side
    1,485.35x = 1,139,530.69
  5. Step 5: Solve for x
    x = 1,139,530.69/1,485.35
  6. Step 6: Final answer
    x = 767.18

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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.