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Finding the Fourth Proportional to 408,897.20, 613,806.60 and 315,815.60

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Solution

The fourth proportional to 408,897.20, 613,806.60 and 315,815.60 is: 474,079.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,897.20 : 613,806.60 = 315,815.60 : x
  2. Step 2: Convert to fraction form
    408,897.20/613,806.60 = 315,815.60/x
  3. Step 3: Cross multiply
    408,897.20x = 613,806.60 × 315,815.60
  4. Step 4: Simplify right side
    408,897.20x = 193,849,699,662.96
  5. Step 5: Solve for x
    x = 193,849,699,662.96/408,897.20
  6. Step 6: Final answer
    x = 474,079.30

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1.5x scale

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.