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Finding the Fourth Proportional to 547,566.30, 823,099.05 and 390,879.90

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Solution

The fourth proportional to 547,566.30, 823,099.05 and 390,879.90 is: 587,568.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,566.30 : 823,099.05 = 390,879.90 : x
  2. Step 2: Convert to fraction form
    547,566.30/823,099.05 = 390,879.90/x
  3. Step 3: Cross multiply
    547,566.30x = 823,099.05 × 390,879.90
  4. Step 4: Simplify right side
    547,566.30x = 321,732,874,354.10
  5. Step 5: Solve for x
    x = 321,732,874,354.10/547,566.30
  6. Step 6: Final answer
    x = 587,568.80

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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.