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Finding the Fourth Proportional to 578.68, 799.14 and 412.90

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Solution

The fourth proportional to 578.68, 799.14 and 412.90 is: 570.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.68 : 799.14 = 412.90 : x
  2. Step 2: Convert to fraction form
    578.68/799.14 = 412.90/x
  3. Step 3: Cross multiply
    578.68x = 799.14 × 412.90
  4. Step 4: Simplify right side
    578.68x = 329,964.91
  5. Step 5: Solve for x
    x = 329,964.91/578.68
  6. Step 6: Final answer
    x = 570.20

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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.