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Finding the Fourth Proportional to 499,138.36, 688,813.72 and 281,350.44

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Solution

The fourth proportional to 499,138.36, 688,813.72 and 281,350.44 is: 388,265.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,138.36 : 688,813.72 = 281,350.44 : x
  2. Step 2: Convert to fraction form
    499,138.36/688,813.72 = 281,350.44/x
  3. Step 3: Cross multiply
    499,138.36x = 688,813.72 × 281,350.44
  4. Step 4: Simplify right side
    499,138.36x = 193,798,043,200.04
  5. Step 5: Solve for x
    x = 193,798,043,200.04/499,138.36
  6. Step 6: Final answer
    x = 388,265.18

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1.5x scale

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.