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Finding the Fourth Proportional to 413.09, 619.64 and 156.59

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Solution

The fourth proportional to 413.09, 619.64 and 156.59 is: 234.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.09 : 619.64 = 156.59 : x
  2. Step 2: Convert to fraction form
    413.09/619.64 = 156.59/x
  3. Step 3: Cross multiply
    413.09x = 619.64 × 156.59
  4. Step 4: Simplify right side
    413.09x = 97,031.85
  5. Step 5: Solve for x
    x = 97,031.85/413.09
  6. Step 6: Final answer
    x = 234.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.