Home / 1,316.40-1,974.24-494.64

Finding the Fourth Proportional to 1,316.40, 1,974.24 and 494.64

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Solution

The fourth proportional to 1,316.40, 1,974.24 and 494.64 is: 741.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.40 : 1,974.24 = 494.64 : x
  2. Step 2: Convert to fraction form
    1,316.40/1,974.24 = 494.64/x
  3. Step 3: Cross multiply
    1,316.40x = 1,974.24 × 494.64
  4. Step 4: Simplify right side
    1,316.40x = 976,538.07
  5. Step 5: Solve for x
    x = 976,538.07/1,316.40
  6. Step 6: Final answer
    x = 741.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.