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Finding the Fourth Proportional to 423,860.92, 635,200.18 and 318,556.60

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Solution

The fourth proportional to 423,860.92, 635,200.18 and 318,556.60 is: 477,390.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,860.92 : 635,200.18 = 318,556.60 : x
  2. Step 2: Convert to fraction form
    423,860.92/635,200.18 = 318,556.60/x
  3. Step 3: Cross multiply
    423,860.92x = 635,200.18 × 318,556.60
  4. Step 4: Simplify right side
    423,860.92x = 202,347,209,660.19
  5. Step 5: Solve for x
    x = 202,347,209,660.19/423,860.92
  6. Step 6: Final answer
    x = 477,390.58

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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.