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Finding the Fourth Proportional to 645,173.93, 890,362.92 and 354,807.57

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Solution

The fourth proportional to 645,173.93, 890,362.92 and 354,807.57 is: 489,647.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,173.93 : 890,362.92 = 354,807.57 : x
  2. Step 2: Convert to fraction form
    645,173.93/890,362.92 = 354,807.57/x
  3. Step 3: Cross multiply
    645,173.93x = 890,362.92 × 354,807.57
  4. Step 4: Simplify right side
    645,173.93x = 315,907,497,837.45
  5. Step 5: Solve for x
    x = 315,907,497,837.45/645,173.93
  6. Step 6: Final answer
    x = 489,647.03

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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.