Home / 1,320.09-1,980.14-346.19

Finding the Fourth Proportional to 1,320.09, 1,980.14 and 346.19

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Solution

The fourth proportional to 1,320.09, 1,980.14 and 346.19 is: 519.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.09 : 1,980.14 = 346.19 : x
  2. Step 2: Convert to fraction form
    1,320.09/1,980.14 = 346.19/x
  3. Step 3: Cross multiply
    1,320.09x = 1,980.14 × 346.19
  4. Step 4: Simplify right side
    1,320.09x = 685,493.03
  5. Step 5: Solve for x
    x = 685,493.03/1,320.09
  6. Step 6: Final answer
    x = 519.28

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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.