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Finding the Fourth Proportional to 399,311.60, 598,967.40 and 133,080.80

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Solution

The fourth proportional to 399,311.60, 598,967.40 and 133,080.80 is: 199,621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,311.60 : 598,967.40 = 133,080.80 : x
  2. Step 2: Convert to fraction form
    399,311.60/598,967.40 = 133,080.80/x
  3. Step 3: Cross multiply
    399,311.60x = 598,967.40 × 133,080.80
  4. Step 4: Simplify right side
    399,311.60x = 79,711,060,765.92
  5. Step 5: Solve for x
    x = 79,711,060,765.92/399,311.60
  6. Step 6: Final answer
    x = 199,621.20

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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.