Home / 389,819.60-584,729.40-386,133.20

Finding the Fourth Proportional to 389,819.60, 584,729.40 and 386,133.20

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Solution

The fourth proportional to 389,819.60, 584,729.40 and 386,133.20 is: 579,199.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,819.60 : 584,729.40 = 386,133.20 : x
  2. Step 2: Convert to fraction form
    389,819.60/584,729.40 = 386,133.20/x
  3. Step 3: Cross multiply
    389,819.60x = 584,729.40 × 386,133.20
  4. Step 4: Simplify right side
    389,819.60x = 225,783,434,356.08
  5. Step 5: Solve for x
    x = 225,783,434,356.08/389,819.60
  6. Step 6: Final answer
    x = 579,199.80

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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.