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Finding the Fourth Proportional to 571,874.45, 857,817.81 and 172,518.68

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Solution

The fourth proportional to 571,874.45, 857,817.81 and 172,518.68 is: 258,779.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,874.45 : 857,817.81 = 172,518.68 : x
  2. Step 2: Convert to fraction form
    571,874.45/857,817.81 = 172,518.68/x
  3. Step 3: Cross multiply
    571,874.45x = 857,817.81 × 172,518.68
  4. Step 4: Simplify right side
    571,874.45x = 147,989,591,972.60
  5. Step 5: Solve for x
    x = 147,989,591,972.60/571,874.45
  6. Step 6: Final answer
    x = 258,779.87

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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.