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Finding the Fourth Proportional to 499,351.32, 689,172.35 and 281,604.80

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Solution

The fourth proportional to 499,351.32, 689,172.35 and 281,604.80 is: 388,652.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,351.32 : 689,172.35 = 281,604.80 : x
  2. Step 2: Convert to fraction form
    499,351.32/689,172.35 = 281,604.80/x
  3. Step 3: Cross multiply
    499,351.32x = 689,172.35 × 281,604.80
  4. Step 4: Simplify right side
    499,351.32x = 194,074,239,325.05
  5. Step 5: Solve for x
    x = 194,074,239,325.05/499,351.32
  6. Step 6: Final answer
    x = 388,652.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.