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Finding the Fourth Proportional to 579,431.80, 869,234.10 and 205,425.40

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Solution

The fourth proportional to 579,431.80, 869,234.10 and 205,425.40 is: 308,168.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,431.80 : 869,234.10 = 205,425.40 : x
  2. Step 2: Convert to fraction form
    579,431.80/869,234.10 = 205,425.40/x
  3. Step 3: Cross multiply
    579,431.80x = 869,234.10 × 205,425.40
  4. Step 4: Simplify right side
    579,431.80x = 178,562,762,686.14
  5. Step 5: Solve for x
    x = 178,562,762,686.14/579,431.80
  6. Step 6: Final answer
    x = 308,168.73

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Double scale
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1.5x scale

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.