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Finding the Fourth Proportional to 397,716.76, 548,849.20 and 218,868.76

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Solution

The fourth proportional to 397,716.76, 548,849.20 and 218,868.76 is: 302,038.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,716.76 : 548,849.20 = 218,868.76 : x
  2. Step 2: Convert to fraction form
    397,716.76/548,849.20 = 218,868.76/x
  3. Step 3: Cross multiply
    397,716.76x = 548,849.20 × 218,868.76
  4. Step 4: Simplify right side
    397,716.76x = 120,125,943,830.99
  5. Step 5: Solve for x
    x = 120,125,943,830.99/397,716.76
  6. Step 6: Final answer
    x = 302,038.93

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1.5x scale

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.