Home / 1,313.15-1,813.79-921.92

Finding the Fourth Proportional to 1,313.15, 1,813.79 and 921.92

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Solution

The fourth proportional to 1,313.15, 1,813.79 and 921.92 is: 1,273.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.15 : 1,813.79 = 921.92 : x
  2. Step 2: Convert to fraction form
    1,313.15/1,813.79 = 921.92/x
  3. Step 3: Cross multiply
    1,313.15x = 1,813.79 × 921.92
  4. Step 4: Simplify right side
    1,313.15x = 1,672,162.51
  5. Step 5: Solve for x
    x = 1,672,162.51/1,313.15
  6. Step 6: Final answer
    x = 1,273.40

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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.