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Finding the Fourth Proportional to 412.40, 613.98 and 412.40

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Solution

The fourth proportional to 412.40, 613.98 and 412.40 is: 613.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.40 : 613.98 = 412.40 : x
  2. Step 2: Convert to fraction form
    412.40/613.98 = 412.40/x
  3. Step 3: Cross multiply
    412.40x = 613.98 × 412.40
  4. Step 4: Simplify right side
    412.40x = 253,205.35
  5. Step 5: Solve for x
    x = 253,205.35/412.40
  6. Step 6: Final answer
    x = 613.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.