Home / 1,207.04-1,666.37-986.72

Finding the Fourth Proportional to 1,207.04, 1,666.37 and 986.72

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Solution

The fourth proportional to 1,207.04, 1,666.37 and 986.72 is: 1,362.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.04 : 1,666.37 = 986.72 : x
  2. Step 2: Convert to fraction form
    1,207.04/1,666.37 = 986.72/x
  3. Step 3: Cross multiply
    1,207.04x = 1,666.37 × 986.72
  4. Step 4: Simplify right side
    1,207.04x = 1,644,234.74
  5. Step 5: Solve for x
    x = 1,644,234.74/1,207.04
  6. Step 6: Final answer
    x = 1,362.21

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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.