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Finding the Fourth Proportional to 478,990.72, 661,046.56 and 264,172.80

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Solution

The fourth proportional to 478,990.72, 661,046.56 and 264,172.80 is: 364,580.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,990.72 : 661,046.56 = 264,172.80 : x
  2. Step 2: Convert to fraction form
    478,990.72/661,046.56 = 264,172.80/x
  3. Step 3: Cross multiply
    478,990.72x = 661,046.56 × 264,172.80
  4. Step 4: Simplify right side
    478,990.72x = 174,630,520,685.57
  5. Step 5: Solve for x
    x = 174,630,520,685.57/478,990.72
  6. Step 6: Final answer
    x = 364,580.18

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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.