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Finding the Fourth Proportional to 1,204.10, 1,661.54 and 706.65

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Solution

The fourth proportional to 1,204.10, 1,661.54 and 706.65 is: 975.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,204.10 : 1,661.54 = 706.65 : x
  2. Step 2: Convert to fraction form
    1,204.10/1,661.54 = 706.65/x
  3. Step 3: Cross multiply
    1,204.10x = 1,661.54 × 706.65
  4. Step 4: Simplify right side
    1,204.10x = 1,174,127.24
  5. Step 5: Solve for x
    x = 1,174,127.24/1,204.10
  6. Step 6: Final answer
    x = 975.11

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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.