Home / 1,320.23-1,980.59-442.65

Finding the Fourth Proportional to 1,320.23, 1,980.59 and 442.65

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Solution

The fourth proportional to 1,320.23, 1,980.59 and 442.65 is: 664.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.23 : 1,980.59 = 442.65 : x
  2. Step 2: Convert to fraction form
    1,320.23/1,980.59 = 442.65/x
  3. Step 3: Cross multiply
    1,320.23x = 1,980.59 × 442.65
  4. Step 4: Simplify right side
    1,320.23x = 876,708.16
  5. Step 5: Solve for x
    x = 876,708.16/1,320.23
  6. Step 6: Final answer
    x = 664.06

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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.