Home / 674,407.20-1,011,448.80-389,481.60

Finding the Fourth Proportional to 674,407.20, 1,011,448.80 and 389,481.60

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Solution

The fourth proportional to 674,407.20, 1,011,448.80 and 389,481.60 is: 584,128.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,407.20 : 1,011,448.80 = 389,481.60 : x
  2. Step 2: Convert to fraction form
    674,407.20/1,011,448.80 = 389,481.60/x
  3. Step 3: Cross multiply
    674,407.20x = 1,011,448.80 × 389,481.60
  4. Step 4: Simplify right side
    674,407.20x = 393,940,696,942.08
  5. Step 5: Solve for x
    x = 393,940,696,942.08/674,407.20
  6. Step 6: Final answer
    x = 584,128.84

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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.