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Finding the Fourth Proportional to 1,075.91, 1,615.31 and 637.97

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Solution

The fourth proportional to 1,075.91, 1,615.31 and 637.97 is: 957.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.91 : 1,615.31 = 637.97 : x
  2. Step 2: Convert to fraction form
    1,075.91/1,615.31 = 637.97/x
  3. Step 3: Cross multiply
    1,075.91x = 1,615.31 × 637.97
  4. Step 4: Simplify right side
    1,075.91x = 1,030,516.13
  5. Step 5: Solve for x
    x = 1,030,516.13/1,075.91
  6. Step 6: Final answer
    x = 957.81

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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.