Home / 1,316.15-1,979.01-1,005.87

Finding the Fourth Proportional to 1,316.15, 1,979.01 and 1,005.87

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Solution

The fourth proportional to 1,316.15, 1,979.01 and 1,005.87 is: 1,512.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.15 : 1,979.01 = 1,005.87 : x
  2. Step 2: Convert to fraction form
    1,316.15/1,979.01 = 1,005.87/x
  3. Step 3: Cross multiply
    1,316.15x = 1,979.01 × 1,005.87
  4. Step 4: Simplify right side
    1,316.15x = 1,990,620.25
  5. Step 5: Solve for x
    x = 1,990,620.25/1,316.15
  6. Step 6: Final answer
    x = 1,512.46

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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.