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Finding the Fourth Proportional to 390,367.20, 585,550.80 and 94,879.20

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Solution

The fourth proportional to 390,367.20, 585,550.80 and 94,879.20 is: 142,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,367.20 : 585,550.80 = 94,879.20 : x
  2. Step 2: Convert to fraction form
    390,367.20/585,550.80 = 94,879.20/x
  3. Step 3: Cross multiply
    390,367.20x = 585,550.80 × 94,879.20
  4. Step 4: Simplify right side
    390,367.20x = 55,556,591,463.36
  5. Step 5: Solve for x
    x = 55,556,591,463.36/390,367.20
  6. Step 6: Final answer
    x = 142,318.80

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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.