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Finding the Fourth Proportional to 551,143.42, 760,528.36 and 321,720.64

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Solution

The fourth proportional to 551,143.42, 760,528.36 and 321,720.64 is: 443,945.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,143.42 : 760,528.36 = 321,720.64 : x
  2. Step 2: Convert to fraction form
    551,143.42/760,528.36 = 321,720.64/x
  3. Step 3: Cross multiply
    551,143.42x = 760,528.36 × 321,720.64
  4. Step 4: Simplify right side
    551,143.42x = 244,677,670,717.35
  5. Step 5: Solve for x
    x = 244,677,670,717.35/551,143.42
  6. Step 6: Final answer
    x = 443,945.55

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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.