Home / 1,398.47-2,086.56-1,190.70

Finding the Fourth Proportional to 1,398.47, 2,086.56 and 1,190.70

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Solution

The fourth proportional to 1,398.47, 2,086.56 and 1,190.70 is: 1,776.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.47 : 2,086.56 = 1,190.70 : x
  2. Step 2: Convert to fraction form
    1,398.47/2,086.56 = 1,190.70/x
  3. Step 3: Cross multiply
    1,398.47x = 2,086.56 × 1,190.70
  4. Step 4: Simplify right side
    1,398.47x = 2,484,466.99
  5. Step 5: Solve for x
    x = 2,484,466.99/1,398.47
  6. Step 6: Final answer
    x = 1,776.57

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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.