Home / 1,308.50-1,806.90-976.35

Finding the Fourth Proportional to 1,308.50, 1,806.90 and 976.35

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Solution

The fourth proportional to 1,308.50, 1,806.90 and 976.35 is: 1,348.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.50 : 1,806.90 = 976.35 : x
  2. Step 2: Convert to fraction form
    1,308.50/1,806.90 = 976.35/x
  3. Step 3: Cross multiply
    1,308.50x = 1,806.90 × 976.35
  4. Step 4: Simplify right side
    1,308.50x = 1,764,166.82
  5. Step 5: Solve for x
    x = 1,764,166.82/1,308.50
  6. Step 6: Final answer
    x = 1,348.24

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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.