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Finding the Fourth Proportional to 687.79, 948.73 and 604.90

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Solution

The fourth proportional to 687.79, 948.73 and 604.90 is: 834.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.79 : 948.73 = 604.90 : x
  2. Step 2: Convert to fraction form
    687.79/948.73 = 604.90/x
  3. Step 3: Cross multiply
    687.79x = 948.73 × 604.90
  4. Step 4: Simplify right side
    687.79x = 573,879.01
  5. Step 5: Solve for x
    x = 573,879.01/687.79
  6. Step 6: Final answer
    x = 834.39

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1.5x scale

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.