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Finding the Fourth Proportional to 671.99, 926.93 and 485.69

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Solution

The fourth proportional to 671.99, 926.93 and 485.69 is: 669.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.99 : 926.93 = 485.69 : x
  2. Step 2: Convert to fraction form
    671.99/926.93 = 485.69/x
  3. Step 3: Cross multiply
    671.99x = 926.93 × 485.69
  4. Step 4: Simplify right side
    671.99x = 450,198.20
  5. Step 5: Solve for x
    x = 450,198.20/671.99
  6. Step 6: Final answer
    x = 669.95

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Half scale
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Double scale
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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.