Home / 1,680-2,319.36-1,265.28

Finding the Fourth Proportional to 1,680, 2,319.36 and 1,265.28

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Solution

The fourth proportional to 1,680, 2,319.36 and 1,265.28 is: 1,746.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680 : 2,319.36 = 1,265.28 : x
  2. Step 2: Convert to fraction form
    1,680/2,319.36 = 1,265.28/x
  3. Step 3: Cross multiply
    1,680x = 2,319.36 × 1,265.28
  4. Step 4: Simplify right side
    1,680x = 2,934,639.82
  5. Step 5: Solve for x
    x = 2,934,639.82/1,680
  6. Step 6: Final answer
    x = 1,746.81

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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.