Home / 521,570.10-781,723.35-221,420.55

Finding the Fourth Proportional to 521,570.10, 781,723.35 and 221,420.55

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Solution

The fourth proportional to 521,570.10, 781,723.35 and 221,420.55 is: 331,862.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,570.10 : 781,723.35 = 221,420.55 : x
  2. Step 2: Convert to fraction form
    521,570.10/781,723.35 = 221,420.55/x
  3. Step 3: Cross multiply
    521,570.10x = 781,723.35 × 221,420.55
  4. Step 4: Simplify right side
    521,570.10x = 173,089,614,104.84
  5. Step 5: Solve for x
    x = 173,089,614,104.84/521,570.10
  6. Step 6: Final answer
    x = 331,862.61

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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.