Home / 764,909.20-1,145,808.60-391,142.80

Finding the Fourth Proportional to 764,909.20, 1,145,808.60 and 391,142.80

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Solution

The fourth proportional to 764,909.20, 1,145,808.60 and 391,142.80 is: 585,918.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,909.20 : 1,145,808.60 = 391,142.80 : x
  2. Step 2: Convert to fraction form
    764,909.20/1,145,808.60 = 391,142.80/x
  3. Step 3: Cross multiply
    764,909.20x = 1,145,808.60 × 391,142.80
  4. Step 4: Simplify right side
    764,909.20x = 448,174,784,068.08
  5. Step 5: Solve for x
    x = 448,174,784,068.08/764,909.20
  6. Step 6: Final answer
    x = 585,918.94

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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.