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Finding the Fourth Proportional to 303,412.80, 425,400 and 303,412.80

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Solution

The fourth proportional to 303,412.80, 425,400 and 303,412.80 is: 425,400

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,412.80 : 425,400 = 303,412.80 : x
  2. Step 2: Convert to fraction form
    303,412.80/425,400 = 303,412.80/x
  3. Step 3: Cross multiply
    303,412.80x = 425,400 × 303,412.80
  4. Step 4: Simplify right side
    303,412.80x = 129,071,805,120
  5. Step 5: Solve for x
    x = 129,071,805,120/303,412.80
  6. Step 6: Final answer
    x = 425,400

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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.