Home / 1,127.04-1,689.41-639.06

Finding the Fourth Proportional to 1,127.04, 1,689.41 and 639.06

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Solution

The fourth proportional to 1,127.04, 1,689.41 and 639.06 is: 957.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.04 : 1,689.41 = 639.06 : x
  2. Step 2: Convert to fraction form
    1,127.04/1,689.41 = 639.06/x
  3. Step 3: Cross multiply
    1,127.04x = 1,689.41 × 639.06
  4. Step 4: Simplify right side
    1,127.04x = 1,079,631.16
  5. Step 5: Solve for x
    x = 1,079,631.16/1,127.04
  6. Step 6: Final answer
    x = 957.94

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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.