Home / 1,643.48-2,465.30-669.72

Finding the Fourth Proportional to 1,643.48, 2,465.30 and 669.72

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Solution

The fourth proportional to 1,643.48, 2,465.30 and 669.72 is: 1,004.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.48 : 2,465.30 = 669.72 : x
  2. Step 2: Convert to fraction form
    1,643.48/2,465.30 = 669.72/x
  3. Step 3: Cross multiply
    1,643.48x = 2,465.30 × 669.72
  4. Step 4: Simplify right side
    1,643.48x = 1,651,060.72
  5. Step 5: Solve for x
    x = 1,651,060.72/1,643.48
  6. Step 6: Final answer
    x = 1,004.61

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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.