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Finding the Fourth Proportional to 519,311.40, 779,112.90 and 253,080.60

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Solution

The fourth proportional to 519,311.40, 779,112.90 and 253,080.60 is: 379,691.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,311.40 : 779,112.90 = 253,080.60 : x
  2. Step 2: Convert to fraction form
    519,311.40/779,112.90 = 253,080.60/x
  3. Step 3: Cross multiply
    519,311.40x = 779,112.90 × 253,080.60
  4. Step 4: Simplify right side
    519,311.40x = 197,178,360,199.74
  5. Step 5: Solve for x
    x = 197,178,360,199.74/519,311.40
  6. Step 6: Final answer
    x = 379,691.95

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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.