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Finding the Fourth Proportional to 403,430.20, 605,231.70 and 122,975.80

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Solution

The fourth proportional to 403,430.20, 605,231.70 and 122,975.80 is: 184,490.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,430.20 : 605,231.70 = 122,975.80 : x
  2. Step 2: Convert to fraction form
    403,430.20/605,231.70 = 122,975.80/x
  3. Step 3: Cross multiply
    403,430.20x = 605,231.70 × 122,975.80
  4. Step 4: Simplify right side
    403,430.20x = 74,428,852,492.86
  5. Step 5: Solve for x
    x = 74,428,852,492.86/403,430.20
  6. Step 6: Final answer
    x = 184,490.04

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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.