Home / 1,319.54-1,979.60-442.07

Finding the Fourth Proportional to 1,319.54, 1,979.60 and 442.07

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Solution

The fourth proportional to 1,319.54, 1,979.60 and 442.07 is: 663.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.54 : 1,979.60 = 442.07 : x
  2. Step 2: Convert to fraction form
    1,319.54/1,979.60 = 442.07/x
  3. Step 3: Cross multiply
    1,319.54x = 1,979.60 × 442.07
  4. Step 4: Simplify right side
    1,319.54x = 875,117.09
  5. Step 5: Solve for x
    x = 875,117.09/1,319.54
  6. Step 6: Final answer
    x = 663.20

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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.