Home / 1,319.97-1,979.28-442.16

Finding the Fourth Proportional to 1,319.97, 1,979.28 and 442.16

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Solution

The fourth proportional to 1,319.97, 1,979.28 and 442.16 is: 663.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.97 : 1,979.28 = 442.16 : x
  2. Step 2: Convert to fraction form
    1,319.97/1,979.28 = 442.16/x
  3. Step 3: Cross multiply
    1,319.97x = 1,979.28 × 442.16
  4. Step 4: Simplify right side
    1,319.97x = 875,158.44
  5. Step 5: Solve for x
    x = 875,158.44/1,319.97
  6. Step 6: Final answer
    x = 663.01

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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.