Home / 420,302.40-630,453.60-387,825.45

Finding the Fourth Proportional to 420,302.40, 630,453.60 and 387,825.45

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Solution

The fourth proportional to 420,302.40, 630,453.60 and 387,825.45 is: 581,738.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,302.40 : 630,453.60 = 387,825.45 : x
  2. Step 2: Convert to fraction form
    420,302.40/630,453.60 = 387,825.45/x
  3. Step 3: Cross multiply
    420,302.40x = 630,453.60 × 387,825.45
  4. Step 4: Simplify right side
    420,302.40x = 244,505,951,124.12
  5. Step 5: Solve for x
    x = 244,505,951,124.12/420,302.40
  6. Step 6: Final answer
    x = 581,738.18

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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.