Home / 3,118.25-4,678.38-1,038.30

Finding the Fourth Proportional to 3,118.25, 4,678.38 and 1,038.30

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Solution

The fourth proportional to 3,118.25, 4,678.38 and 1,038.30 is: 1,557.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.25 : 4,678.38 = 1,038.30 : x
  2. Step 2: Convert to fraction form
    3,118.25/4,678.38 = 1,038.30/x
  3. Step 3: Cross multiply
    3,118.25x = 4,678.38 × 1,038.30
  4. Step 4: Simplify right side
    3,118.25x = 4,857,561.95
  5. Step 5: Solve for x
    x = 4,857,561.95/3,118.25
  6. Step 6: Final answer
    x = 1,557.79

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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.