Home / 764,390.60-1,145,009.10-447,888.20

Finding the Fourth Proportional to 764,390.60, 1,145,009.10 and 447,888.20

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Solution

The fourth proportional to 764,390.60, 1,145,009.10 and 447,888.20 is: 670,908.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,390.60 : 1,145,009.10 = 447,888.20 : x
  2. Step 2: Convert to fraction form
    764,390.60/1,145,009.10 = 447,888.20/x
  3. Step 3: Cross multiply
    764,390.60x = 1,145,009.10 × 447,888.20
  4. Step 4: Simplify right side
    764,390.60x = 512,836,064,782.62
  5. Step 5: Solve for x
    x = 512,836,064,782.62/764,390.60
  6. Step 6: Final answer
    x = 670,908.39

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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.