Home / 686,384.70-1,029,771.45-213,117.90

Finding the Fourth Proportional to 686,384.70, 1,029,771.45 and 213,117.90

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Solution

The fourth proportional to 686,384.70, 1,029,771.45 and 213,117.90 is: 319,737.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,384.70 : 1,029,771.45 = 213,117.90 : x
  2. Step 2: Convert to fraction form
    686,384.70/1,029,771.45 = 213,117.90/x
  3. Step 3: Cross multiply
    686,384.70x = 1,029,771.45 × 213,117.90
  4. Step 4: Simplify right side
    686,384.70x = 219,462,728,903.96
  5. Step 5: Solve for x
    x = 219,462,728,903.96/686,384.70
  6. Step 6: Final answer
    x = 319,737.21

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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.