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Finding the Fourth Proportional to 520,053.60, 780,080.40 and 146,076.60

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Solution

The fourth proportional to 520,053.60, 780,080.40 and 146,076.60 is: 219,114.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,053.60 : 780,080.40 = 146,076.60 : x
  2. Step 2: Convert to fraction form
    520,053.60/780,080.40 = 146,076.60/x
  3. Step 3: Cross multiply
    520,053.60x = 780,080.40 × 146,076.60
  4. Step 4: Simplify right side
    520,053.60x = 113,951,492,558.64
  5. Step 5: Solve for x
    x = 113,951,492,558.64/520,053.60
  6. Step 6: Final answer
    x = 219,114.90

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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.