Home / 3,178.89-4,386.90-1,853.40

Finding the Fourth Proportional to 3,178.89, 4,386.90 and 1,853.40

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Solution

The fourth proportional to 3,178.89, 4,386.90 and 1,853.40 is: 2,557.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.89 : 4,386.90 = 1,853.40 : x
  2. Step 2: Convert to fraction form
    3,178.89/4,386.90 = 1,853.40/x
  3. Step 3: Cross multiply
    3,178.89x = 4,386.90 × 1,853.40
  4. Step 4: Simplify right side
    3,178.89x = 8,130,680.46
  5. Step 5: Solve for x
    x = 8,130,680.46/3,178.89
  6. Step 6: Final answer
    x = 2,557.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.