Home / 1,313.27-1,812.05-870.93

Finding the Fourth Proportional to 1,313.27, 1,812.05 and 870.93

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Solution

The fourth proportional to 1,313.27, 1,812.05 and 870.93 is: 1,201.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.27 : 1,812.05 = 870.93 : x
  2. Step 2: Convert to fraction form
    1,313.27/1,812.05 = 870.93/x
  3. Step 3: Cross multiply
    1,313.27x = 1,812.05 × 870.93
  4. Step 4: Simplify right side
    1,313.27x = 1,578,164.35
  5. Step 5: Solve for x
    x = 1,578,164.35/1,313.27
  6. Step 6: Final answer
    x = 1,201.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.