Home / 1,316.09-1,973.80-391.44

Finding the Fourth Proportional to 1,316.09, 1,973.80 and 391.44

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Solution

The fourth proportional to 1,316.09, 1,973.80 and 391.44 is: 587.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.09 : 1,973.80 = 391.44 : x
  2. Step 2: Convert to fraction form
    1,316.09/1,973.80 = 391.44/x
  3. Step 3: Cross multiply
    1,316.09x = 1,973.80 × 391.44
  4. Step 4: Simplify right side
    1,316.09x = 772,624.27
  5. Step 5: Solve for x
    x = 772,624.27/1,316.09
  6. Step 6: Final answer
    x = 587.06

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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.