Home / 1,331.40-2,000.70-1,318.44

Finding the Fourth Proportional to 1,331.40, 2,000.70 and 1,318.44

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Solution

The fourth proportional to 1,331.40, 2,000.70 and 1,318.44 is: 1,981.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.40 : 2,000.70 = 1,318.44 : x
  2. Step 2: Convert to fraction form
    1,331.40/2,000.70 = 1,318.44/x
  3. Step 3: Cross multiply
    1,331.40x = 2,000.70 × 1,318.44
  4. Step 4: Simplify right side
    1,331.40x = 2,637,802.91
  5. Step 5: Solve for x
    x = 2,637,802.91/1,331.40
  6. Step 6: Final answer
    x = 1,981.22

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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.