Home / 1,319.50-1,979.60-395.06

Finding the Fourth Proportional to 1,319.50, 1,979.60 and 395.06

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Solution

The fourth proportional to 1,319.50, 1,979.60 and 395.06 is: 592.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.50 : 1,979.60 = 395.06 : x
  2. Step 2: Convert to fraction form
    1,319.50/1,979.60 = 395.06/x
  3. Step 3: Cross multiply
    1,319.50x = 1,979.60 × 395.06
  4. Step 4: Simplify right side
    1,319.50x = 782,060.78
  5. Step 5: Solve for x
    x = 782,060.78/1,319.50
  6. Step 6: Final answer
    x = 592.69

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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.