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Finding the Fourth Proportional to 520,057.60, 780,086.40 and 146,080.60

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Solution

The fourth proportional to 520,057.60, 780,086.40 and 146,080.60 is: 219,120.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,057.60 : 780,086.40 = 146,080.60 : x
  2. Step 2: Convert to fraction form
    520,057.60/780,086.40 = 146,080.60/x
  3. Step 3: Cross multiply
    520,057.60x = 780,086.40 × 146,080.60
  4. Step 4: Simplify right side
    520,057.60x = 113,955,489,363.84
  5. Step 5: Solve for x
    x = 113,955,489,363.84/520,057.60
  6. Step 6: Final answer
    x = 219,120.90

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1.5x scale

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.