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Finding the Fourth Proportional to 395,390.20, 593,478.96 and 217,980.76

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Solution

The fourth proportional to 395,390.20, 593,478.96 and 217,980.76 is: 327,188.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,390.20 : 593,478.96 = 217,980.76 : x
  2. Step 2: Convert to fraction form
    395,390.20/593,478.96 = 217,980.76/x
  3. Step 3: Cross multiply
    395,390.20x = 593,478.96 × 217,980.76
  4. Step 4: Simplify right side
    395,390.20x = 129,366,994,744.81
  5. Step 5: Solve for x
    x = 129,366,994,744.81/395,390.20
  6. Step 6: Final answer
    x = 327,188.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.