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Finding the Fourth Proportional to 395,097.98, 545,235.20 and 213,809.90

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Solution

The fourth proportional to 395,097.98, 545,235.20 and 213,809.90 is: 295,057.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,097.98 : 545,235.20 = 213,809.90 : x
  2. Step 2: Convert to fraction form
    395,097.98/545,235.20 = 213,809.90/x
  3. Step 3: Cross multiply
    395,097.98x = 545,235.20 × 213,809.90
  4. Step 4: Simplify right side
    395,097.98x = 116,576,683,588.48
  5. Step 5: Solve for x
    x = 116,576,683,588.48/395,097.98
  6. Step 6: Final answer
    x = 295,057.66

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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.