Home / 443,519.20-665,278.80-127,986.40

Finding the Fourth Proportional to 443,519.20, 665,278.80 and 127,986.40

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Solution

The fourth proportional to 443,519.20, 665,278.80 and 127,986.40 is: 191,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,519.20 : 665,278.80 = 127,986.40 : x
  2. Step 2: Convert to fraction form
    443,519.20/665,278.80 = 127,986.40/x
  3. Step 3: Cross multiply
    443,519.20x = 665,278.80 × 127,986.40
  4. Step 4: Simplify right side
    443,519.20x = 85,146,638,608.32
  5. Step 5: Solve for x
    x = 85,146,638,608.32/443,519.20
  6. Step 6: Final answer
    x = 191,979.60

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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.