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Finding the Fourth Proportional to 720.94, 993.99 and 471.87

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Solution

The fourth proportional to 720.94, 993.99 and 471.87 is: 650.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.94 : 993.99 = 471.87 : x
  2. Step 2: Convert to fraction form
    720.94/993.99 = 471.87/x
  3. Step 3: Cross multiply
    720.94x = 993.99 × 471.87
  4. Step 4: Simplify right side
    720.94x = 469,026.73
  5. Step 5: Solve for x
    x = 469,026.73/720.94
  6. Step 6: Final answer
    x = 650.58

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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.