Home / 686,217.31-1,029,318.47-281,319.17

Finding the Fourth Proportional to 686,217.31, 1,029,318.47 and 281,319.17

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Solution

The fourth proportional to 686,217.31, 1,029,318.47 and 281,319.17 is: 421,975.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,217.31 : 1,029,318.47 = 281,319.17 : x
  2. Step 2: Convert to fraction form
    686,217.31/1,029,318.47 = 281,319.17/x
  3. Step 3: Cross multiply
    686,217.31x = 1,029,318.47 × 281,319.17
  4. Step 4: Simplify right side
    686,217.31x = 289,567,011,092.88
  5. Step 5: Solve for x
    x = 289,567,011,092.88/686,217.31
  6. Step 6: Final answer
    x = 421,975.68

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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.