Home / 1,792.40-2,688.65-867.79

Finding the Fourth Proportional to 1,792.40, 2,688.65 and 867.79

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Solution

The fourth proportional to 1,792.40, 2,688.65 and 867.79 is: 1,301.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,792.40 : 2,688.65 = 867.79 : x
  2. Step 2: Convert to fraction form
    1,792.40/2,688.65 = 867.79/x
  3. Step 3: Cross multiply
    1,792.40x = 2,688.65 × 867.79
  4. Step 4: Simplify right side
    1,792.40x = 2,333,165.80
  5. Step 5: Solve for x
    x = 2,333,165.80/1,792.40
  6. Step 6: Final answer
    x = 1,301.70

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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.