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Finding the Fourth Proportional to 395,041.40, 545,155.39 and 213,756.54

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Solution

The fourth proportional to 395,041.40, 545,155.39 and 213,756.54 is: 294,983.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,041.40 : 545,155.39 = 213,756.54 : x
  2. Step 2: Convert to fraction form
    395,041.40/545,155.39 = 213,756.54/x
  3. Step 3: Cross multiply
    395,041.40x = 545,155.39 × 213,756.54
  4. Step 4: Simplify right side
    395,041.40x = 116,530,532,150.17
  5. Step 5: Solve for x
    x = 116,530,532,150.17/395,041.40
  6. Step 6: Final answer
    x = 294,983.08

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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.