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Finding the Fourth Proportional to 520,040.55, 778,894.43 and 426,728.55

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Solution

The fourth proportional to 520,040.55, 778,894.43 and 426,728.55 is: 639,135.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,040.55 : 778,894.43 = 426,728.55 : x
  2. Step 2: Convert to fraction form
    520,040.55/778,894.43 = 426,728.55/x
  3. Step 3: Cross multiply
    520,040.55x = 778,894.43 × 426,728.55
  4. Step 4: Simplify right side
    520,040.55x = 332,376,488,583.33
  5. Step 5: Solve for x
    x = 332,376,488,583.33/520,040.55
  6. Step 6: Final answer
    x = 639,135.71

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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.