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Finding the Fourth Proportional to 303,427.80, 425,421 and 303,427.80

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Solution

The fourth proportional to 303,427.80, 425,421 and 303,427.80 is: 425,421

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,427.80 : 425,421 = 303,427.80 : x
  2. Step 2: Convert to fraction form
    303,427.80/425,421 = 303,427.80/x
  3. Step 3: Cross multiply
    303,427.80x = 425,421 × 303,427.80
  4. Step 4: Simplify right side
    303,427.80x = 129,084,558,103.80
  5. Step 5: Solve for x
    x = 129,084,558,103.80/303,427.80
  6. Step 6: Final answer
    x = 425,421

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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.