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Finding the Fourth Proportional to 509,669.60, 764,504.40 and 485,175.20

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Solution

The fourth proportional to 509,669.60, 764,504.40 and 485,175.20 is: 727,762.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,669.60 : 764,504.40 = 485,175.20 : x
  2. Step 2: Convert to fraction form
    509,669.60/764,504.40 = 485,175.20/x
  3. Step 3: Cross multiply
    509,669.60x = 764,504.40 × 485,175.20
  4. Step 4: Simplify right side
    509,669.60x = 370,918,575,170.88
  5. Step 5: Solve for x
    x = 370,918,575,170.88/509,669.60
  6. Step 6: Final answer
    x = 727,762.80

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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.