Home / 406,928,046.40-610,392,069.60-388,221,323.20

Finding the Fourth Proportional to 406,928,046.40, 610,392,069.60 and 388,221,323.20

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Solution

The fourth proportional to 406,928,046.40, 610,392,069.60 and 388,221,323.20 is: 582,331,984.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,928,046.40 : 610,392,069.60 = 388,221,323.20 : x
  2. Step 2: Convert to fraction form
    406,928,046.40/610,392,069.60 = 388,221,323.20/x
  3. Step 3: Cross multiply
    406,928,046.40x = 610,392,069.60 × 388,221,323.20
  4. Step 4: Simplify right side
    406,928,046.40x = 236,967,216,930,898,496
  5. Step 5: Solve for x
    x = 236,967,216,930,898,496/406,928,046.40
  6. Step 6: Final answer
    x = 582,331,984.80

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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.