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Finding the Fourth Proportional to 571,455.88, 856,431.70 and 318,855.29

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Solution

The fourth proportional to 571,455.88, 856,431.70 and 318,855.29 is: 477,863.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,455.88 : 856,431.70 = 318,855.29 : x
  2. Step 2: Convert to fraction form
    571,455.88/856,431.70 = 318,855.29/x
  3. Step 3: Cross multiply
    571,455.88x = 856,431.70 × 318,855.29
  4. Step 4: Simplify right side
    571,455.88x = 273,077,772,989.40
  5. Step 5: Solve for x
    x = 273,077,772,989.40/571,455.88
  6. Step 6: Final answer
    x = 477,863.27

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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.