Home / 1,320.24-1,980.18-346.28

Finding the Fourth Proportional to 1,320.24, 1,980.18 and 346.28

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Solution

The fourth proportional to 1,320.24, 1,980.18 and 346.28 is: 519.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.24 : 1,980.18 = 346.28 : x
  2. Step 2: Convert to fraction form
    1,320.24/1,980.18 = 346.28/x
  3. Step 3: Cross multiply
    1,320.24x = 1,980.18 × 346.28
  4. Step 4: Simplify right side
    1,320.24x = 685,696.73
  5. Step 5: Solve for x
    x = 685,696.73/1,320.24
  6. Step 6: Final answer
    x = 519.37

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1.5x scale

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.