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Finding the Fourth Proportional to 299,000.40, 448,500.60 and 287,190.60

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Solution

The fourth proportional to 299,000.40, 448,500.60 and 287,190.60 is: 430,785.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,000.40 : 448,500.60 = 287,190.60 : x
  2. Step 2: Convert to fraction form
    299,000.40/448,500.60 = 287,190.60/x
  3. Step 3: Cross multiply
    299,000.40x = 448,500.60 × 287,190.60
  4. Step 4: Simplify right side
    299,000.40x = 128,805,156,414.36
  5. Step 5: Solve for x
    x = 128,805,156,414.36/299,000.40
  6. Step 6: Final answer
    x = 430,785.90

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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.