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Finding the Fourth Proportional to 1,645.34, 2,465.88 and 670.30

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Solution

The fourth proportional to 1,645.34, 2,465.88 and 670.30 is: 1,004.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.34 : 2,465.88 = 670.30 : x
  2. Step 2: Convert to fraction form
    1,645.34/2,465.88 = 670.30/x
  3. Step 3: Cross multiply
    1,645.34x = 2,465.88 × 670.30
  4. Step 4: Simplify right side
    1,645.34x = 1,652,879.36
  5. Step 5: Solve for x
    x = 1,652,879.36/1,645.34
  6. Step 6: Final answer
    x = 1,004.58

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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.