Home / 686,216.81-1,029,317.72-281,318.66

Finding the Fourth Proportional to 686,216.81, 1,029,317.72 and 281,318.66

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Solution

The fourth proportional to 686,216.81, 1,029,317.72 and 281,318.66 is: 421,974.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,216.81 : 1,029,317.72 = 281,318.66 : x
  2. Step 2: Convert to fraction form
    686,216.81/1,029,317.72 = 281,318.66/x
  3. Step 3: Cross multiply
    686,216.81x = 1,029,317.72 × 281,318.66
  4. Step 4: Simplify right side
    686,216.81x = 289,566,282,871.36
  5. Step 5: Solve for x
    x = 289,566,282,871.36/686,216.81
  6. Step 6: Final answer
    x = 421,974.92

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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.