Home / 1,946.38-2,905.36-1,688.20

Finding the Fourth Proportional to 1,946.38, 2,905.36 and 1,688.20

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Solution

The fourth proportional to 1,946.38, 2,905.36 and 1,688.20 is: 2,519.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.38 : 2,905.36 = 1,688.20 : x
  2. Step 2: Convert to fraction form
    1,946.38/2,905.36 = 1,688.20/x
  3. Step 3: Cross multiply
    1,946.38x = 2,905.36 × 1,688.20
  4. Step 4: Simplify right side
    1,946.38x = 4,904,828.75
  5. Step 5: Solve for x
    x = 4,904,828.75/1,946.38
  6. Step 6: Final answer
    x = 2,519.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.