Home / 813,120.69-1,219,570.30-214,031.68

Finding the Fourth Proportional to 813,120.69, 1,219,570.30 and 214,031.68

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Solution

The fourth proportional to 813,120.69, 1,219,570.30 and 214,031.68 is: 321,018.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,120.69 : 1,219,570.30 = 214,031.68 : x
  2. Step 2: Convert to fraction form
    813,120.69/1,219,570.30 = 214,031.68/x
  3. Step 3: Cross multiply
    813,120.69x = 1,219,570.30 × 214,031.68
  4. Step 4: Simplify right side
    813,120.69x = 261,026,680,187.10
  5. Step 5: Solve for x
    x = 261,026,680,187.10/813,120.69
  6. Step 6: Final answer
    x = 321,018.37

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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.