Home / 1,938.40-2,670.47-1,347.91

Finding the Fourth Proportional to 1,938.40, 2,670.47 and 1,347.91

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Solution

The fourth proportional to 1,938.40, 2,670.47 and 1,347.91 is: 1,856.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.40 : 2,670.47 = 1,347.91 : x
  2. Step 2: Convert to fraction form
    1,938.40/2,670.47 = 1,347.91/x
  3. Step 3: Cross multiply
    1,938.40x = 2,670.47 × 1,347.91
  4. Step 4: Simplify right side
    1,938.40x = 3,599,544.86
  5. Step 5: Solve for x
    x = 3,599,544.86/1,938.40
  6. Step 6: Final answer
    x = 1,856.97

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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.