Home / 645,353.52-890,609.61-354,977.43

Finding the Fourth Proportional to 645,353.52, 890,609.61 and 354,977.43

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Solution

The fourth proportional to 645,353.52, 890,609.61 and 354,977.43 is: 489,880.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,353.52 : 890,609.61 = 354,977.43 : x
  2. Step 2: Convert to fraction form
    645,353.52/890,609.61 = 354,977.43/x
  3. Step 3: Cross multiply
    645,353.52x = 890,609.61 × 354,977.43
  4. Step 4: Simplify right side
    645,353.52x = 316,146,310,491.10
  5. Step 5: Solve for x
    x = 316,146,310,491.10/645,353.52
  6. Step 6: Final answer
    x = 489,880.82

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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.