Home / 1,090.31-1,501.35-986.12

Finding the Fourth Proportional to 1,090.31, 1,501.35 and 986.12

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Solution

The fourth proportional to 1,090.31, 1,501.35 and 986.12 is: 1,357.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.31 : 1,501.35 = 986.12 : x
  2. Step 2: Convert to fraction form
    1,090.31/1,501.35 = 986.12/x
  3. Step 3: Cross multiply
    1,090.31x = 1,501.35 × 986.12
  4. Step 4: Simplify right side
    1,090.31x = 1,480,503.76
  5. Step 5: Solve for x
    x = 1,480,503.76/1,090.31
  6. Step 6: Final answer
    x = 1,357.87

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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.