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Finding the Fourth Proportional to 508,438.27, 701,631.47 and 278,994.85

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Solution

The fourth proportional to 508,438.27, 701,631.47 and 278,994.85 is: 385,005.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,438.27 : 701,631.47 = 278,994.85 : x
  2. Step 2: Convert to fraction form
    508,438.27/701,631.47 = 278,994.85/x
  3. Step 3: Cross multiply
    508,438.27x = 701,631.47 × 278,994.85
  4. Step 4: Simplify right side
    508,438.27x = 195,751,565,332.96
  5. Step 5: Solve for x
    x = 195,751,565,332.96/508,438.27
  6. Step 6: Final answer
    x = 385,005.57

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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.