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Finding the Fourth Proportional to 707,423.85, 976,239.05 and 385,133.28

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Solution

The fourth proportional to 707,423.85, 976,239.05 and 385,133.28 is: 531,480.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,423.85 : 976,239.05 = 385,133.28 : x
  2. Step 2: Convert to fraction form
    707,423.85/976,239.05 = 385,133.28/x
  3. Step 3: Cross multiply
    707,423.85x = 976,239.05 × 385,133.28
  4. Step 4: Simplify right side
    707,423.85x = 375,982,145,464.92
  5. Step 5: Solve for x
    x = 375,982,145,464.92/707,423.85
  6. Step 6: Final answer
    x = 531,480.73

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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.