Home / 645,026.28-890,146.86-354,650.04

Finding the Fourth Proportional to 645,026.28, 890,146.86 and 354,650.04

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Solution

The fourth proportional to 645,026.28, 890,146.86 and 354,650.04 is: 489,422.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,026.28 : 890,146.86 = 354,650.04 : x
  2. Step 2: Convert to fraction form
    645,026.28/890,146.86 = 354,650.04/x
  3. Step 3: Cross multiply
    645,026.28x = 890,146.86 × 354,650.04
  4. Step 4: Simplify right side
    645,026.28x = 315,690,619,504.87
  5. Step 5: Solve for x
    x = 315,690,619,504.87/645,026.28
  6. Step 6: Final answer
    x = 489,422.88

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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.