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Finding the Fourth Proportional to 436,670.60, 655,005.90 and 121,130.60

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Solution

The fourth proportional to 436,670.60, 655,005.90 and 121,130.60 is: 181,695.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,670.60 : 655,005.90 = 121,130.60 : x
  2. Step 2: Convert to fraction form
    436,670.60/655,005.90 = 121,130.60/x
  3. Step 3: Cross multiply
    436,670.60x = 655,005.90 × 121,130.60
  4. Step 4: Simplify right side
    436,670.60x = 79,341,257,670.54
  5. Step 5: Solve for x
    x = 79,341,257,670.54/436,670.60
  6. Step 6: Final answer
    x = 181,695.90

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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.