Home / 645,163.60-890,345.01-354,760.06

Finding the Fourth Proportional to 645,163.60, 890,345.01 and 354,760.06

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Solution

The fourth proportional to 645,163.60, 890,345.01 and 354,760.06 is: 489,579.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,163.60 : 890,345.01 = 354,760.06 : x
  2. Step 2: Convert to fraction form
    645,163.60/890,345.01 = 354,760.06/x
  3. Step 3: Cross multiply
    645,163.60x = 890,345.01 × 354,760.06
  4. Step 4: Simplify right side
    645,163.60x = 315,858,849,168.30
  5. Step 5: Solve for x
    x = 315,858,849,168.30/645,163.60
  6. Step 6: Final answer
    x = 489,579.46

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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.