Home / 1,318.20-1,820.64-875.33

Finding the Fourth Proportional to 1,318.20, 1,820.64 and 875.33

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Solution

The fourth proportional to 1,318.20, 1,820.64 and 875.33 is: 1,208.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.20 : 1,820.64 = 875.33 : x
  2. Step 2: Convert to fraction form
    1,318.20/1,820.64 = 875.33/x
  3. Step 3: Cross multiply
    1,318.20x = 1,820.64 × 875.33
  4. Step 4: Simplify right side
    1,318.20x = 1,593,661.82
  5. Step 5: Solve for x
    x = 1,593,661.82/1,318.20
  6. Step 6: Final answer
    x = 1,208.97

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1.5x scale

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.