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Finding the Fourth Proportional to 320,109.80, 479,532.90 and 162,451.40

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Solution

The fourth proportional to 320,109.80, 479,532.90 and 162,451.40 is: 243,356.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,109.80 : 479,532.90 = 162,451.40 : x
  2. Step 2: Convert to fraction form
    320,109.80/479,532.90 = 162,451.40/x
  3. Step 3: Cross multiply
    320,109.80x = 479,532.90 × 162,451.40
  4. Step 4: Simplify right side
    320,109.80x = 77,900,790,951.06
  5. Step 5: Solve for x
    x = 77,900,790,951.06/320,109.80
  6. Step 6: Final answer
    x = 243,356.47

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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.