Home / 764,985.34-1,055,673.93-420,813.86

Finding the Fourth Proportional to 764,985.34, 1,055,673.93 and 420,813.86

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Solution

The fourth proportional to 764,985.34, 1,055,673.93 and 420,813.86 is: 580,719.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,985.34 : 1,055,673.93 = 420,813.86 : x
  2. Step 2: Convert to fraction form
    764,985.34/1,055,673.93 = 420,813.86/x
  3. Step 3: Cross multiply
    764,985.34x = 1,055,673.93 × 420,813.86
  4. Step 4: Simplify right side
    764,985.34x = 444,242,214,528.25
  5. Step 5: Solve for x
    x = 444,242,214,528.25/764,985.34
  6. Step 6: Final answer
    x = 580,719.91

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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.