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Finding the Fourth Proportional to 571,919.22, 857,321 and 272,319.30

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Solution

The fourth proportional to 571,919.22, 857,321 and 272,319.30 is: 408,213.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,919.22 : 857,321 = 272,319.30 : x
  2. Step 2: Convert to fraction form
    571,919.22/857,321 = 272,319.30/x
  3. Step 3: Cross multiply
    571,919.22x = 857,321 × 272,319.30
  4. Step 4: Simplify right side
    571,919.22x = 233,465,054,595.30
  5. Step 5: Solve for x
    x = 233,465,054,595.30/571,919.22
  6. Step 6: Final answer
    x = 408,213.34

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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.