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Finding the Fourth Proportional to 395,118.60, 545,264.34 and 213,830.67

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Solution

The fourth proportional to 395,118.60, 545,264.34 and 213,830.67 is: 295,086.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,118.60 : 545,264.34 = 213,830.67 : x
  2. Step 2: Convert to fraction form
    395,118.60/545,264.34 = 213,830.67/x
  3. Step 3: Cross multiply
    395,118.60x = 545,264.34 × 213,830.67
  4. Step 4: Simplify right side
    395,118.60x = 116,594,238,651.90
  5. Step 5: Solve for x
    x = 116,594,238,651.90/395,118.60
  6. Step 6: Final answer
    x = 295,086.69

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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.