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Finding the Fourth Proportional to 408,045.15, 612,125.33 and 127,533.15

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Solution

The fourth proportional to 408,045.15, 612,125.33 and 127,533.15 is: 191,317.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,045.15 : 612,125.33 = 127,533.15 : x
  2. Step 2: Convert to fraction form
    408,045.15/612,125.33 = 127,533.15/x
  3. Step 3: Cross multiply
    408,045.15x = 612,125.33 × 127,533.15
  4. Step 4: Simplify right side
    408,045.15x = 78,066,270,892.02
  5. Step 5: Solve for x
    x = 78,066,270,892.02/408,045.15
  6. Step 6: Final answer
    x = 191,317.73

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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.