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Finding the Fourth Proportional to 418,937.80, 628,406.70 and 325,510.60

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Solution

The fourth proportional to 418,937.80, 628,406.70 and 325,510.60 is: 488,265.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,937.80 : 628,406.70 = 325,510.60 : x
  2. Step 2: Convert to fraction form
    418,937.80/628,406.70 = 325,510.60/x
  3. Step 3: Cross multiply
    418,937.80x = 628,406.70 × 325,510.60
  4. Step 4: Simplify right side
    418,937.80x = 204,553,041,961.02
  5. Step 5: Solve for x
    x = 204,553,041,961.02/418,937.80
  6. Step 6: Final answer
    x = 488,265.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.