Home / 628,328.80-942,493.20-389,180.40

Finding the Fourth Proportional to 628,328.80, 942,493.20 and 389,180.40

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Solution

The fourth proportional to 628,328.80, 942,493.20 and 389,180.40 is: 583,770.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,328.80 : 942,493.20 = 389,180.40 : x
  2. Step 2: Convert to fraction form
    628,328.80/942,493.20 = 389,180.40/x
  3. Step 3: Cross multiply
    628,328.80x = 942,493.20 × 389,180.40
  4. Step 4: Simplify right side
    628,328.80x = 366,799,880,573.28
  5. Step 5: Solve for x
    x = 366,799,880,573.28/628,328.80
  6. Step 6: Final answer
    x = 583,770.60

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Double scale
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Similar ratio
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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.