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Finding the Fourth Proportional to 518,735.05, 715,859.82 and 292,380.55

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Solution

The fourth proportional to 518,735.05, 715,859.82 and 292,380.55 is: 403,488.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,735.05 : 715,859.82 = 292,380.55 : x
  2. Step 2: Convert to fraction form
    518,735.05/715,859.82 = 292,380.55/x
  3. Step 3: Cross multiply
    518,735.05x = 715,859.82 × 292,380.55
  4. Step 4: Simplify right side
    518,735.05x = 209,303,487,894.50
  5. Step 5: Solve for x
    x = 209,303,487,894.50/518,735.05
  6. Step 6: Final answer
    x = 403,488.23

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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.