Home / 780,021.90-1,170,032.85-380,918.70

Finding the Fourth Proportional to 780,021.90, 1,170,032.85 and 380,918.70

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Solution

The fourth proportional to 780,021.90, 1,170,032.85 and 380,918.70 is: 571,378.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,021.90 : 1,170,032.85 = 380,918.70 : x
  2. Step 2: Convert to fraction form
    780,021.90/1,170,032.85 = 380,918.70/x
  3. Step 3: Cross multiply
    780,021.90x = 1,170,032.85 × 380,918.70
  4. Step 4: Simplify right side
    780,021.90x = 445,687,392,179.30
  5. Step 5: Solve for x
    x = 445,687,392,179.30/780,021.90
  6. Step 6: Final answer
    x = 571,378.05

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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.