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Finding the Fourth Proportional to 1,030.60, 1,544.55 and 413.80

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Solution

The fourth proportional to 1,030.60, 1,544.55 and 413.80 is: 620.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.60 : 1,544.55 = 413.80 : x
  2. Step 2: Convert to fraction form
    1,030.60/1,544.55 = 413.80/x
  3. Step 3: Cross multiply
    1,030.60x = 1,544.55 × 413.80
  4. Step 4: Simplify right side
    1,030.60x = 639,134.79
  5. Step 5: Solve for x
    x = 639,134.79/1,030.60
  6. Step 6: Final answer
    x = 620.16

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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.