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Finding the Fourth Proportional to 485,423.20, 729,009.60 and 469,676.80

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Solution

The fourth proportional to 485,423.20, 729,009.60 and 469,676.80 is: 705,361.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,423.20 : 729,009.60 = 469,676.80 : x
  2. Step 2: Convert to fraction form
    485,423.20/729,009.60 = 469,676.80/x
  3. Step 3: Cross multiply
    485,423.20x = 729,009.60 × 469,676.80
  4. Step 4: Simplify right side
    485,423.20x = 342,398,896,097.28
  5. Step 5: Solve for x
    x = 342,398,896,097.28/485,423.20
  6. Step 6: Final answer
    x = 705,361.62

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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.