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Finding the Fourth Proportional to 303,420.90, 455,390.55 and 135,200.10

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Solution

The fourth proportional to 303,420.90, 455,390.55 and 135,200.10 is: 202,915.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,420.90 : 455,390.55 = 135,200.10 : x
  2. Step 2: Convert to fraction form
    303,420.90/455,390.55 = 135,200.10/x
  3. Step 3: Cross multiply
    303,420.90x = 455,390.55 × 135,200.10
  4. Step 4: Simplify right side
    303,420.90x = 61,568,847,899.06
  5. Step 5: Solve for x
    x = 61,568,847,899.06/303,420.90
  6. Step 6: Final answer
    x = 202,915.65

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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.