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Finding the Fourth Proportional to 1,228.63, 1,695.51 and 704.69

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Solution

The fourth proportional to 1,228.63, 1,695.51 and 704.69 is: 972.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.63 : 1,695.51 = 704.69 : x
  2. Step 2: Convert to fraction form
    1,228.63/1,695.51 = 704.69/x
  3. Step 3: Cross multiply
    1,228.63x = 1,695.51 × 704.69
  4. Step 4: Simplify right side
    1,228.63x = 1,194,808.94
  5. Step 5: Solve for x
    x = 1,194,808.94/1,228.63
  6. Step 6: Final answer
    x = 972.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.