Home / 678,413.60-1,017,620.40-205,049.60

Finding the Fourth Proportional to 678,413.60, 1,017,620.40 and 205,049.60

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Solution

The fourth proportional to 678,413.60, 1,017,620.40 and 205,049.60 is: 307,574.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,413.60 : 1,017,620.40 = 205,049.60 : x
  2. Step 2: Convert to fraction form
    678,413.60/1,017,620.40 = 205,049.60/x
  3. Step 3: Cross multiply
    678,413.60x = 1,017,620.40 × 205,049.60
  4. Step 4: Simplify right side
    678,413.60x = 208,662,655,971.84
  5. Step 5: Solve for x
    x = 208,662,655,971.84/678,413.60
  6. Step 6: Final answer
    x = 307,574.40

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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.