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Finding the Fourth Proportional to 397,329.55, 548,321.63 and 216,042.71

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Solution

The fourth proportional to 397,329.55, 548,321.63 and 216,042.71 is: 298,142.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,329.55 : 548,321.63 = 216,042.71 : x
  2. Step 2: Convert to fraction form
    397,329.55/548,321.63 = 216,042.71/x
  3. Step 3: Cross multiply
    397,329.55x = 548,321.63 × 216,042.71
  4. Step 4: Simplify right side
    397,329.55x = 118,460,887,075.00
  5. Step 5: Solve for x
    x = 118,460,887,075.00/397,329.55
  6. Step 6: Final answer
    x = 298,142.66

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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.