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Finding the Fourth Proportional to 451.69, 672.90 and 435.16

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Solution

The fourth proportional to 451.69, 672.90 and 435.16 is: 648.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.69 : 672.90 = 435.16 : x
  2. Step 2: Convert to fraction form
    451.69/672.90 = 435.16/x
  3. Step 3: Cross multiply
    451.69x = 672.90 × 435.16
  4. Step 4: Simplify right side
    451.69x = 292,819.16
  5. Step 5: Solve for x
    x = 292,819.16/451.69
  6. Step 6: Final answer
    x = 648.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.