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Finding the Fourth Proportional to 672.79, 1,004.25 and 625.79

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Solution

The fourth proportional to 672.79, 1,004.25 and 625.79 is: 934.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.79 : 1,004.25 = 625.79 : x
  2. Step 2: Convert to fraction form
    672.79/1,004.25 = 625.79/x
  3. Step 3: Cross multiply
    672.79x = 1,004.25 × 625.79
  4. Step 4: Simplify right side
    672.79x = 628,450.94
  5. Step 5: Solve for x
    x = 628,450.94/672.79
  6. Step 6: Final answer
    x = 934.10

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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.