Home / 820,079.90-1,229,979.65-220,900.93

Finding the Fourth Proportional to 820,079.90, 1,229,979.65 and 220,900.93

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Solution

The fourth proportional to 820,079.90, 1,229,979.65 and 220,900.93 is: 331,313.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,079.90 : 1,229,979.65 = 220,900.93 : x
  2. Step 2: Convert to fraction form
    820,079.90/1,229,979.65 = 220,900.93/x
  3. Step 3: Cross multiply
    820,079.90x = 1,229,979.65 × 220,900.93
  4. Step 4: Simplify right side
    820,079.90x = 271,703,652,547.82
  5. Step 5: Solve for x
    x = 271,703,652,547.82/820,079.90
  6. Step 6: Final answer
    x = 331,313.63

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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.