Home / 1,176.57-1,620.93-979.74

Finding the Fourth Proportional to 1,176.57, 1,620.93 and 979.74

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Solution

The fourth proportional to 1,176.57, 1,620.93 and 979.74 is: 1,349.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,176.57 : 1,620.93 = 979.74 : x
  2. Step 2: Convert to fraction form
    1,176.57/1,620.93 = 979.74/x
  3. Step 3: Cross multiply
    1,176.57x = 1,620.93 × 979.74
  4. Step 4: Simplify right side
    1,176.57x = 1,588,089.96
  5. Step 5: Solve for x
    x = 1,588,089.96/1,176.57
  6. Step 6: Final answer
    x = 1,349.76

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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.