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Finding the Fourth Proportional to 447,629.80, 671,444.70 and 430,426.60

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Solution

The fourth proportional to 447,629.80, 671,444.70 and 430,426.60 is: 645,639.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,629.80 : 671,444.70 = 430,426.60 : x
  2. Step 2: Convert to fraction form
    447,629.80/671,444.70 = 430,426.60/x
  3. Step 3: Cross multiply
    447,629.80x = 671,444.70 × 430,426.60
  4. Step 4: Simplify right side
    447,629.80x = 289,007,659,309.02
  5. Step 5: Solve for x
    x = 289,007,659,309.02/447,629.80
  6. Step 6: Final answer
    x = 645,639.90

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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.