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Finding the Fourth Proportional to 624,413.20, 936,619.80 and 455,139.40

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Solution

The fourth proportional to 624,413.20, 936,619.80 and 455,139.40 is: 682,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,413.20 : 936,619.80 = 455,139.40 : x
  2. Step 2: Convert to fraction form
    624,413.20/936,619.80 = 455,139.40/x
  3. Step 3: Cross multiply
    624,413.20x = 936,619.80 × 455,139.40
  4. Step 4: Simplify right side
    624,413.20x = 426,292,573,800.12
  5. Step 5: Solve for x
    x = 426,292,573,800.12/624,413.20
  6. Step 6: Final answer
    x = 682,709.10

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1.5x scale

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.