Home / 687,972.16-1,031,921.79-214,603.30

Finding the Fourth Proportional to 687,972.16, 1,031,921.79 and 214,603.30

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Solution

The fourth proportional to 687,972.16, 1,031,921.79 and 214,603.30 is: 321,893.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,972.16 : 1,031,921.79 = 214,603.30 : x
  2. Step 2: Convert to fraction form
    687,972.16/1,031,921.79 = 214,603.30/x
  3. Step 3: Cross multiply
    687,972.16x = 1,031,921.79 × 214,603.30
  4. Step 4: Simplify right side
    687,972.16x = 221,453,821,475.91
  5. Step 5: Solve for x
    x = 221,453,821,475.91/687,972.16
  6. Step 6: Final answer
    x = 321,893.58

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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.