Home / 764,985.60-1,055,674.31-420,814.13

Finding the Fourth Proportional to 764,985.60, 1,055,674.31 and 420,814.13

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Solution

The fourth proportional to 764,985.60, 1,055,674.31 and 420,814.13 is: 580,720.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,985.60 : 1,055,674.31 = 420,814.13 : x
  2. Step 2: Convert to fraction form
    764,985.60/1,055,674.31 = 420,814.13/x
  3. Step 3: Cross multiply
    764,985.60x = 1,055,674.31 × 420,814.13
  4. Step 4: Simplify right side
    764,985.60x = 444,242,658,943.56
  5. Step 5: Solve for x
    x = 444,242,658,943.56/764,985.60
  6. Step 6: Final answer
    x = 580,720.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.