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Finding the Fourth Proportional to 347,412.80, 521,119.20 and 328,059.20

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Solution

The fourth proportional to 347,412.80, 521,119.20 and 328,059.20 is: 492,088.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,412.80 : 521,119.20 = 328,059.20 : x
  2. Step 2: Convert to fraction form
    347,412.80/521,119.20 = 328,059.20/x
  3. Step 3: Cross multiply
    347,412.80x = 521,119.20 × 328,059.20
  4. Step 4: Simplify right side
    347,412.80x = 170,957,947,856.64
  5. Step 5: Solve for x
    x = 170,957,947,856.64/347,412.80
  6. Step 6: Final answer
    x = 492,088.80

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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.