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Finding the Fourth Proportional to 395,091.76, 545,222.47 and 213,799.72

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Solution

The fourth proportional to 395,091.76, 545,222.47 and 213,799.72 is: 295,041.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,091.76 : 545,222.47 = 213,799.72 : x
  2. Step 2: Convert to fraction form
    395,091.76/545,222.47 = 213,799.72/x
  3. Step 3: Cross multiply
    395,091.76x = 545,222.47 × 213,799.72
  4. Step 4: Simplify right side
    395,091.76x = 116,568,411,423.71
  5. Step 5: Solve for x
    x = 116,568,411,423.71/395,091.76
  6. Step 6: Final answer
    x = 295,041.36

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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.