Home / 389,432.40-537,420.60-228,382.80

Finding the Fourth Proportional to 389,432.40, 537,420.60 and 228,382.80

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Solution

The fourth proportional to 389,432.40, 537,420.60 and 228,382.80 is: 315,170.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,432.40 : 537,420.60 = 228,382.80 : x
  2. Step 2: Convert to fraction form
    389,432.40/537,420.60 = 228,382.80/x
  3. Step 3: Cross multiply
    389,432.40x = 537,420.60 × 228,382.80
  4. Step 4: Simplify right side
    389,432.40x = 122,737,621,405.68
  5. Step 5: Solve for x
    x = 122,737,621,405.68/389,432.40
  6. Step 6: Final answer
    x = 315,170.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.