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Finding the Fourth Proportional to 342,007.80, 479,991.90 and 342,007.80

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Solution

The fourth proportional to 342,007.80, 479,991.90 and 342,007.80 is: 479,991.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,007.80 : 479,991.90 = 342,007.80 : x
  2. Step 2: Convert to fraction form
    342,007.80/479,991.90 = 342,007.80/x
  3. Step 3: Cross multiply
    342,007.80x = 479,991.90 × 342,007.80
  4. Step 4: Simplify right side
    342,007.80x = 164,160,973,736.82
  5. Step 5: Solve for x
    x = 164,160,973,736.82/342,007.80
  6. Step 6: Final answer
    x = 479,991.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.