Home / 1,246.15-1,868.59-380.35

Finding the Fourth Proportional to 1,246.15, 1,868.59 and 380.35

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Solution

The fourth proportional to 1,246.15, 1,868.59 and 380.35 is: 570.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.15 : 1,868.59 = 380.35 : x
  2. Step 2: Convert to fraction form
    1,246.15/1,868.59 = 380.35/x
  3. Step 3: Cross multiply
    1,246.15x = 1,868.59 × 380.35
  4. Step 4: Simplify right side
    1,246.15x = 710,718.21
  5. Step 5: Solve for x
    x = 710,718.21/1,246.15
  6. Step 6: Final answer
    x = 570.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.