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Finding the Fourth Proportional to 720.26, 994.75 and 486.98

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Solution

The fourth proportional to 720.26, 994.75 and 486.98 is: 672.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.26 : 994.75 = 486.98 : x
  2. Step 2: Convert to fraction form
    720.26/994.75 = 486.98/x
  3. Step 3: Cross multiply
    720.26x = 994.75 × 486.98
  4. Step 4: Simplify right side
    720.26x = 484,423.36
  5. Step 5: Solve for x
    x = 484,423.36/720.26
  6. Step 6: Final answer
    x = 672.57

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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.