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Finding the Fourth Proportional to 555,197.85, 766,218.29 and 313,539.21

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Solution

The fourth proportional to 555,197.85, 766,218.29 and 313,539.21 is: 432,709.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,197.85 : 766,218.29 = 313,539.21 : x
  2. Step 2: Convert to fraction form
    555,197.85/766,218.29 = 313,539.21/x
  3. Step 3: Cross multiply
    555,197.85x = 766,218.29 × 313,539.21
  4. Step 4: Simplify right side
    555,197.85x = 240,239,475,766.46
  5. Step 5: Solve for x
    x = 240,239,475,766.46/555,197.85
  6. Step 6: Final answer
    x = 432,709.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.