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Finding the Fourth Proportional to 1,124.27, 1,687.31 and 637.66

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Solution

The fourth proportional to 1,124.27, 1,687.31 and 637.66 is: 957.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.27 : 1,687.31 = 637.66 : x
  2. Step 2: Convert to fraction form
    1,124.27/1,687.31 = 637.66/x
  3. Step 3: Cross multiply
    1,124.27x = 1,687.31 × 637.66
  4. Step 4: Simplify right side
    1,124.27x = 1,075,930.09
  5. Step 5: Solve for x
    x = 1,075,930.09/1,124.27
  6. Step 6: Final answer
    x = 957.00

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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.