Home / 686,117.12-1,029,126.24-212,790.18

Finding the Fourth Proportional to 686,117.12, 1,029,126.24 and 212,790.18

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Solution

The fourth proportional to 686,117.12, 1,029,126.24 and 212,790.18 is: 319,169.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,117.12 : 1,029,126.24 = 212,790.18 : x
  2. Step 2: Convert to fraction form
    686,117.12/1,029,126.24 = 212,790.18/x
  3. Step 3: Cross multiply
    686,117.12x = 1,029,126.24 × 212,790.18
  4. Step 4: Simplify right side
    686,117.12x = 218,987,957,852.32
  5. Step 5: Solve for x
    x = 218,987,957,852.32/686,117.12
  6. Step 6: Final answer
    x = 319,169.94

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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.