Home / 1,319.49-1,979.26-498.15

Finding the Fourth Proportional to 1,319.49, 1,979.26 and 498.15

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Solution

The fourth proportional to 1,319.49, 1,979.26 and 498.15 is: 747.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.49 : 1,979.26 = 498.15 : x
  2. Step 2: Convert to fraction form
    1,319.49/1,979.26 = 498.15/x
  3. Step 3: Cross multiply
    1,319.49x = 1,979.26 × 498.15
  4. Step 4: Simplify right side
    1,319.49x = 985,967.12
  5. Step 5: Solve for x
    x = 985,967.12/1,319.49
  6. Step 6: Final answer
    x = 747.23

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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.