Home / 820,280.52-1,230,413.40-259,315.20

Finding the Fourth Proportional to 820,280.52, 1,230,413.40 and 259,315.20

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Solution

The fourth proportional to 820,280.52, 1,230,413.40 and 259,315.20 is: 388,970.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,280.52 : 1,230,413.40 = 259,315.20 : x
  2. Step 2: Convert to fraction form
    820,280.52/1,230,413.40 = 259,315.20/x
  3. Step 3: Cross multiply
    820,280.52x = 1,230,413.40 × 259,315.20
  4. Step 4: Simplify right side
    820,280.52x = 319,064,896,903.68
  5. Step 5: Solve for x
    x = 319,064,896,903.68/820,280.52
  6. Step 6: Final answer
    x = 388,970.47

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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.