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Finding the Fourth Proportional to 386,441.80, 579,662.70 and 316,400.20

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Solution

The fourth proportional to 386,441.80, 579,662.70 and 316,400.20 is: 474,600.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,441.80 : 579,662.70 = 316,400.20 : x
  2. Step 2: Convert to fraction form
    386,441.80/579,662.70 = 316,400.20/x
  3. Step 3: Cross multiply
    386,441.80x = 579,662.70 × 316,400.20
  4. Step 4: Simplify right side
    386,441.80x = 183,405,394,212.54
  5. Step 5: Solve for x
    x = 183,405,394,212.54/386,441.80
  6. Step 6: Final answer
    x = 474,600.30

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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.