Home / 1,319.85-1,979.73-454.16

Finding the Fourth Proportional to 1,319.85, 1,979.73 and 454.16

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Solution

The fourth proportional to 1,319.85, 1,979.73 and 454.16 is: 681.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.85 : 1,979.73 = 454.16 : x
  2. Step 2: Convert to fraction form
    1,319.85/1,979.73 = 454.16/x
  3. Step 3: Cross multiply
    1,319.85x = 1,979.73 × 454.16
  4. Step 4: Simplify right side
    1,319.85x = 899,114.18
  5. Step 5: Solve for x
    x = 899,114.18/1,319.85
  6. Step 6: Final answer
    x = 681.22

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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.