Home / 820,186.20-1,230,279.30-745,390.80

Finding the Fourth Proportional to 820,186.20, 1,230,279.30 and 745,390.80

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Solution

The fourth proportional to 820,186.20, 1,230,279.30 and 745,390.80 is: 1,118,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,186.20 : 1,230,279.30 = 745,390.80 : x
  2. Step 2: Convert to fraction form
    820,186.20/1,230,279.30 = 745,390.80/x
  3. Step 3: Cross multiply
    820,186.20x = 1,230,279.30 × 745,390.80
  4. Step 4: Simplify right side
    820,186.20x = 917,038,871,650.44
  5. Step 5: Solve for x
    x = 917,038,871,650.44/820,186.20
  6. Step 6: Final answer
    x = 1,118,086.20

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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.