Home / 388,827.20-583,240.80-139,476.80

Finding the Fourth Proportional to 388,827.20, 583,240.80 and 139,476.80

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Solution

The fourth proportional to 388,827.20, 583,240.80 and 139,476.80 is: 209,215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,827.20 : 583,240.80 = 139,476.80 : x
  2. Step 2: Convert to fraction form
    388,827.20/583,240.80 = 139,476.80/x
  3. Step 3: Cross multiply
    388,827.20x = 583,240.80 × 139,476.80
  4. Step 4: Simplify right side
    388,827.20x = 81,348,560,413.44
  5. Step 5: Solve for x
    x = 81,348,560,413.44/388,827.20
  6. Step 6: Final answer
    x = 209,215.20

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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.