Home / 1,351.13-1,863.69-931.52

Finding the Fourth Proportional to 1,351.13, 1,863.69 and 931.52

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Solution

The fourth proportional to 1,351.13, 1,863.69 and 931.52 is: 1,284.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.13 : 1,863.69 = 931.52 : x
  2. Step 2: Convert to fraction form
    1,351.13/1,863.69 = 931.52/x
  3. Step 3: Cross multiply
    1,351.13x = 1,863.69 × 931.52
  4. Step 4: Simplify right side
    1,351.13x = 1,736,055.19
  5. Step 5: Solve for x
    x = 1,736,055.19/1,351.13
  6. Step 6: Final answer
    x = 1,284.90

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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.