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Finding the Fourth Proportional to 262,003.20, 392,745.60 and 128,774.40

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Solution

The fourth proportional to 262,003.20, 392,745.60 and 128,774.40 is: 193,034.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,003.20 : 392,745.60 = 128,774.40 : x
  2. Step 2: Convert to fraction form
    262,003.20/392,745.60 = 128,774.40/x
  3. Step 3: Cross multiply
    262,003.20x = 392,745.60 × 128,774.40
  4. Step 4: Simplify right side
    262,003.20x = 50,575,578,992.64
  5. Step 5: Solve for x
    x = 50,575,578,992.64/262,003.20
  6. Step 6: Final answer
    x = 193,034.20

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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.