Home / 393,140.20-589,710.30-386,579.20

Finding the Fourth Proportional to 393,140.20, 589,710.30 and 386,579.20

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Solution

The fourth proportional to 393,140.20, 589,710.30 and 386,579.20 is: 579,868.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,140.20 : 589,710.30 = 386,579.20 : x
  2. Step 2: Convert to fraction form
    393,140.20/589,710.30 = 386,579.20/x
  3. Step 3: Cross multiply
    393,140.20x = 589,710.30 × 386,579.20
  4. Step 4: Simplify right side
    393,140.20x = 227,969,736,005.76
  5. Step 5: Solve for x
    x = 227,969,736,005.76/393,140.20
  6. Step 6: Final answer
    x = 579,868.80

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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.