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Finding the Fourth Proportional to 518,678.64, 715,833.45 and 300,935.25

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Solution

The fourth proportional to 518,678.64, 715,833.45 and 300,935.25 is: 415,323.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,678.64 : 715,833.45 = 300,935.25 : x
  2. Step 2: Convert to fraction form
    518,678.64/715,833.45 = 300,935.25/x
  3. Step 3: Cross multiply
    518,678.64x = 715,833.45 × 300,935.25
  4. Step 4: Simplify right side
    518,678.64x = 215,419,518,234.11
  5. Step 5: Solve for x
    x = 215,419,518,234.11/518,678.64
  6. Step 6: Final answer
    x = 415,323.67

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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.