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Finding the Fourth Proportional to 518,852.35, 715,906.87 and 315,010.45

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Solution

The fourth proportional to 518,852.35, 715,906.87 and 315,010.45 is: 434,648.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,852.35 : 715,906.87 = 315,010.45 : x
  2. Step 2: Convert to fraction form
    518,852.35/715,906.87 = 315,010.45/x
  3. Step 3: Cross multiply
    518,852.35x = 715,906.87 × 315,010.45
  4. Step 4: Simplify right side
    518,852.35x = 225,518,147,156.08
  5. Step 5: Solve for x
    x = 225,518,147,156.08/518,852.35
  6. Step 6: Final answer
    x = 434,648.02

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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.