Home / 2,345.43-3,516.39-1,420.78

Finding the Fourth Proportional to 2,345.43, 3,516.39 and 1,420.78

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Solution

The fourth proportional to 2,345.43, 3,516.39 and 1,420.78 is: 2,130.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,345.43 : 3,516.39 = 1,420.78 : x
  2. Step 2: Convert to fraction form
    2,345.43/3,516.39 = 1,420.78/x
  3. Step 3: Cross multiply
    2,345.43x = 3,516.39 × 1,420.78
  4. Step 4: Simplify right side
    2,345.43x = 4,996,016.58
  5. Step 5: Solve for x
    x = 4,996,016.58/2,345.43
  6. Step 6: Final answer
    x = 2,130.11

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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.