Home / 2,130.39-2,939.36-1,433.79

Finding the Fourth Proportional to 2,130.39, 2,939.36 and 1,433.79

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Solution

The fourth proportional to 2,130.39, 2,939.36 and 1,433.79 is: 1,978.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.39 : 2,939.36 = 1,433.79 : x
  2. Step 2: Convert to fraction form
    2,130.39/2,939.36 = 1,433.79/x
  3. Step 3: Cross multiply
    2,130.39x = 2,939.36 × 1,433.79
  4. Step 4: Simplify right side
    2,130.39x = 4,214,417.81
  5. Step 5: Solve for x
    x = 4,214,417.81/2,130.39
  6. Step 6: Final answer
    x = 1,978.24

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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.