Home / 1,319.33-1,979.10-345.42

Finding the Fourth Proportional to 1,319.33, 1,979.10 and 345.42

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Solution

The fourth proportional to 1,319.33, 1,979.10 and 345.42 is: 518.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.33 : 1,979.10 = 345.42 : x
  2. Step 2: Convert to fraction form
    1,319.33/1,979.10 = 345.42/x
  3. Step 3: Cross multiply
    1,319.33x = 1,979.10 × 345.42
  4. Step 4: Simplify right side
    1,319.33x = 683,620.72
  5. Step 5: Solve for x
    x = 683,620.72/1,319.33
  6. Step 6: Final answer
    x = 518.16

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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.