Home / 1,420.06-1,959.66-790.57

Finding the Fourth Proportional to 1,420.06, 1,959.66 and 790.57

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Solution

The fourth proportional to 1,420.06, 1,959.66 and 790.57 is: 1,090.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.06 : 1,959.66 = 790.57 : x
  2. Step 2: Convert to fraction form
    1,420.06/1,959.66 = 790.57/x
  3. Step 3: Cross multiply
    1,420.06x = 1,959.66 × 790.57
  4. Step 4: Simplify right side
    1,420.06x = 1,549,243.51
  5. Step 5: Solve for x
    x = 1,549,243.51/1,420.06
  6. Step 6: Final answer
    x = 1,090.97

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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.