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Finding the Fourth Proportional to 354,998.40, 488,654.82 and 309,596.28

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Solution

The fourth proportional to 354,998.40, 488,654.82 and 309,596.28 is: 426,158.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,998.40 : 488,654.82 = 309,596.28 : x
  2. Step 2: Convert to fraction form
    354,998.40/488,654.82 = 309,596.28/x
  3. Step 3: Cross multiply
    354,998.40x = 488,654.82 × 309,596.28
  4. Step 4: Simplify right side
    354,998.40x = 151,285,714,476.07
  5. Step 5: Solve for x
    x = 151,285,714,476.07/354,998.40
  6. Step 6: Final answer
    x = 426,158.86

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1.5x scale

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.