Home / 2,860.18-4,290.35-912.39

Finding the Fourth Proportional to 2,860.18, 4,290.35 and 912.39

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Solution

The fourth proportional to 2,860.18, 4,290.35 and 912.39 is: 1,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,860.18 : 4,290.35 = 912.39 : x
  2. Step 2: Convert to fraction form
    2,860.18/4,290.35 = 912.39/x
  3. Step 3: Cross multiply
    2,860.18x = 4,290.35 × 912.39
  4. Step 4: Simplify right side
    2,860.18x = 3,914,456.92
  5. Step 5: Solve for x
    x = 3,914,456.92/2,860.18
  6. Step 6: Final answer
    x = 1,368.60

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1.5x scale

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.