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Finding the Fourth Proportional to 521,567.30, 782,642.55 and 221,996.90

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Solution

The fourth proportional to 521,567.30, 782,642.55 and 221,996.90 is: 333,119.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,567.30 : 782,642.55 = 221,996.90 : x
  2. Step 2: Convert to fraction form
    521,567.30/782,642.55 = 221,996.90/x
  3. Step 3: Cross multiply
    521,567.30x = 782,642.55 × 221,996.90
  4. Step 4: Simplify right side
    521,567.30x = 173,744,219,908.10
  5. Step 5: Solve for x
    x = 173,744,219,908.10/521,567.30
  6. Step 6: Final answer
    x = 333,119.46

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Similar ratio
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1.5x scale

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.