Home / 380,412.23-525,515.68-303,830.78

Finding the Fourth Proportional to 380,412.23, 525,515.68 and 303,830.78

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Solution

The fourth proportional to 380,412.23, 525,515.68 and 303,830.78 is: 419,723.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,412.23 : 525,515.68 = 303,830.78 : x
  2. Step 2: Convert to fraction form
    380,412.23/525,515.68 = 303,830.78/x
  3. Step 3: Cross multiply
    380,412.23x = 525,515.68 × 303,830.78
  4. Step 4: Simplify right side
    380,412.23x = 159,667,838,956.63
  5. Step 5: Solve for x
    x = 159,667,838,956.63/380,412.23
  6. Step 6: Final answer
    x = 419,723.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.