Home / 1,320.12-1,980.18-346.23

Finding the Fourth Proportional to 1,320.12, 1,980.18 and 346.23

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Solution

The fourth proportional to 1,320.12, 1,980.18 and 346.23 is: 519.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.12 : 1,980.18 = 346.23 : x
  2. Step 2: Convert to fraction form
    1,320.12/1,980.18 = 346.23/x
  3. Step 3: Cross multiply
    1,320.12x = 1,980.18 × 346.23
  4. Step 4: Simplify right side
    1,320.12x = 685,597.72
  5. Step 5: Solve for x
    x = 685,597.72/1,320.12
  6. Step 6: Final answer
    x = 519.35

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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.