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Finding the Fourth Proportional to 274,820.40, 412,230.60 and 85,280.40

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Solution

The fourth proportional to 274,820.40, 412,230.60 and 85,280.40 is: 127,920.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,820.40 : 412,230.60 = 85,280.40 : x
  2. Step 2: Convert to fraction form
    274,820.40/412,230.60 = 85,280.40/x
  3. Step 3: Cross multiply
    274,820.40x = 412,230.60 × 85,280.40
  4. Step 4: Simplify right side
    274,820.40x = 35,155,190,460.24
  5. Step 5: Solve for x
    x = 35,155,190,460.24/274,820.40
  6. Step 6: Final answer
    x = 127,920.60

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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.