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Finding the Fourth Proportional to 395,090, 545,228.04 and 216,245.84

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Solution

The fourth proportional to 395,090, 545,228.04 and 216,245.84 is: 298,421.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,090 : 545,228.04 = 216,245.84 : x
  2. Step 2: Convert to fraction form
    395,090/545,228.04 = 216,245.84/x
  3. Step 3: Cross multiply
    395,090x = 545,228.04 × 216,245.84
  4. Step 4: Simplify right side
    395,090x = 117,903,295,501.35
  5. Step 5: Solve for x
    x = 117,903,295,501.35/395,090
  6. Step 6: Final answer
    x = 298,421.36

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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.