Home / 1,351.80-1,864.20-931.48

Finding the Fourth Proportional to 1,351.80, 1,864.20 and 931.48

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Solution

The fourth proportional to 1,351.80, 1,864.20 and 931.48 is: 1,284.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.80 : 1,864.20 = 931.48 : x
  2. Step 2: Convert to fraction form
    1,351.80/1,864.20 = 931.48/x
  3. Step 3: Cross multiply
    1,351.80x = 1,864.20 × 931.48
  4. Step 4: Simplify right side
    1,351.80x = 1,736,465.02
  5. Step 5: Solve for x
    x = 1,736,465.02/1,351.80
  6. Step 6: Final answer
    x = 1,284.56

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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.