Home / 645,474.73-890,755.14-355,090.33

Finding the Fourth Proportional to 645,474.73, 890,755.14 and 355,090.33

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Solution

The fourth proportional to 645,474.73, 890,755.14 and 355,090.33 is: 490,024.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,474.73 : 890,755.14 = 355,090.33 : x
  2. Step 2: Convert to fraction form
    645,474.73/890,755.14 = 355,090.33/x
  3. Step 3: Cross multiply
    645,474.73x = 890,755.14 × 355,090.33
  4. Step 4: Simplify right side
    645,474.73x = 316,298,536,611.80
  5. Step 5: Solve for x
    x = 316,298,536,611.80/645,474.73
  6. Step 6: Final answer
    x = 490,024.66

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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.