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Finding the Fourth Proportional to 303,485.90, 455,289.60 and 90,253.40

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Solution

The fourth proportional to 303,485.90, 455,289.60 and 90,253.40 is: 135,398.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,485.90 : 455,289.60 = 90,253.40 : x
  2. Step 2: Convert to fraction form
    303,485.90/455,289.60 = 90,253.40/x
  3. Step 3: Cross multiply
    303,485.90x = 455,289.60 × 90,253.40
  4. Step 4: Simplify right side
    303,485.90x = 41,091,434,384.64
  5. Step 5: Solve for x
    x = 41,091,434,384.64/303,485.90
  6. Step 6: Final answer
    x = 135,398.17

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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.