Home / 686,254.62-1,029,448.45-212,812.86

Finding the Fourth Proportional to 686,254.62, 1,029,448.45 and 212,812.86

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Solution

The fourth proportional to 686,254.62, 1,029,448.45 and 212,812.86 is: 319,239.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,254.62 : 1,029,448.45 = 212,812.86 : x
  2. Step 2: Convert to fraction form
    686,254.62/1,029,448.45 = 212,812.86/x
  3. Step 3: Cross multiply
    686,254.62x = 1,029,448.45 × 212,812.86
  4. Step 4: Simplify right side
    686,254.62x = 219,079,868,867.07
  5. Step 5: Solve for x
    x = 219,079,868,867.07/686,254.62
  6. Step 6: Final answer
    x = 319,239.92

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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.