Home / 3,119.13-4,678.18-1,038.65

Finding the Fourth Proportional to 3,119.13, 4,678.18 and 1,038.65

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Solution

The fourth proportional to 3,119.13, 4,678.18 and 1,038.65 is: 1,557.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.13 : 4,678.18 = 1,038.65 : x
  2. Step 2: Convert to fraction form
    3,119.13/4,678.18 = 1,038.65/x
  3. Step 3: Cross multiply
    3,119.13x = 4,678.18 × 1,038.65
  4. Step 4: Simplify right side
    3,119.13x = 4,858,965.67
  5. Step 5: Solve for x
    x = 4,858,965.67/3,119.13
  6. Step 6: Final answer
    x = 1,557.80

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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.