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Finding the Fourth Proportional to 386,187.60, 579,281.40 and 320,869.20

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Solution

The fourth proportional to 386,187.60, 579,281.40 and 320,869.20 is: 481,303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,187.60 : 579,281.40 = 320,869.20 : x
  2. Step 2: Convert to fraction form
    386,187.60/579,281.40 = 320,869.20/x
  3. Step 3: Cross multiply
    386,187.60x = 579,281.40 × 320,869.20
  4. Step 4: Simplify right side
    386,187.60x = 185,873,559,392.88
  5. Step 5: Solve for x
    x = 185,873,559,392.88/386,187.60
  6. Step 6: Final answer
    x = 481,303.80

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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.