Home / 3,119.95-4,678.38-1,658.71

Finding the Fourth Proportional to 3,119.95, 4,678.38 and 1,658.71

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Solution

The fourth proportional to 3,119.95, 4,678.38 and 1,658.71 is: 2,487.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.95 : 4,678.38 = 1,658.71 : x
  2. Step 2: Convert to fraction form
    3,119.95/4,678.38 = 1,658.71/x
  3. Step 3: Cross multiply
    3,119.95x = 4,678.38 × 1,658.71
  4. Step 4: Simplify right side
    3,119.95x = 7,760,075.69
  5. Step 5: Solve for x
    x = 7,760,075.69/3,119.95
  6. Step 6: Final answer
    x = 2,487.24

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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.