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Finding the Fourth Proportional to 401,600.20, 602,486.70 and 121,145.80

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Solution

The fourth proportional to 401,600.20, 602,486.70 and 121,145.80 is: 181,744.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,600.20 : 602,486.70 = 121,145.80 : x
  2. Step 2: Convert to fraction form
    401,600.20/602,486.70 = 121,145.80/x
  3. Step 3: Cross multiply
    401,600.20x = 602,486.70 × 121,145.80
  4. Step 4: Simplify right side
    401,600.20x = 72,988,733,260.86
  5. Step 5: Solve for x
    x = 72,988,733,260.86/401,600.20
  6. Step 6: Final answer
    x = 181,744.76

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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.