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Finding the Fourth Proportional to 520,053.60, 780,080.40 and 436,072.80

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Solution

The fourth proportional to 520,053.60, 780,080.40 and 436,072.80 is: 654,109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,053.60 : 780,080.40 = 436,072.80 : x
  2. Step 2: Convert to fraction form
    520,053.60/780,080.40 = 436,072.80/x
  3. Step 3: Cross multiply
    520,053.60x = 780,080.40 × 436,072.80
  4. Step 4: Simplify right side
    520,053.60x = 340,171,844,253.12
  5. Step 5: Solve for x
    x = 340,171,844,253.12/520,053.60
  6. Step 6: Final answer
    x = 654,109.20

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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.