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Finding the Fourth Proportional to 479,558.32, 661,748.56 and 307,172.16

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Solution

The fourth proportional to 479,558.32, 661,748.56 and 307,172.16 is: 423,870.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,558.32 : 661,748.56 = 307,172.16 : x
  2. Step 2: Convert to fraction form
    479,558.32/661,748.56 = 307,172.16/x
  3. Step 3: Cross multiply
    479,558.32x = 661,748.56 × 307,172.16
  4. Step 4: Simplify right side
    479,558.32x = 203,270,733,784.16
  5. Step 5: Solve for x
    x = 203,270,733,784.16/479,558.32
  6. Step 6: Final answer
    x = 423,870.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.