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Finding the Fourth Proportional to 303,622.40, 455,433.60 and 213,080.60

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Solution

The fourth proportional to 303,622.40, 455,433.60 and 213,080.60 is: 319,620.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,622.40 : 455,433.60 = 213,080.60 : x
  2. Step 2: Convert to fraction form
    303,622.40/455,433.60 = 213,080.60/x
  3. Step 3: Cross multiply
    303,622.40x = 455,433.60 × 213,080.60
  4. Step 4: Simplify right side
    303,622.40x = 97,044,064,748.16
  5. Step 5: Solve for x
    x = 97,044,064,748.16/303,622.40
  6. Step 6: Final answer
    x = 319,620.90

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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.