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Finding the Fourth Proportional to 413.00, 619.62 and 258.70

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Solution

The fourth proportional to 413.00, 619.62 and 258.70 is: 388.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.00 : 619.62 = 258.70 : x
  2. Step 2: Convert to fraction form
    413.00/619.62 = 258.70/x
  3. Step 3: Cross multiply
    413.00x = 619.62 × 258.70
  4. Step 4: Simplify right side
    413.00x = 160,294.40
  5. Step 5: Solve for x
    x = 160,294.40/413.00
  6. Step 6: Final answer
    x = 388.13

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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.