Home / 1,298,815.70-1,945,271.10-820,518.80

Finding the Fourth Proportional to 1,298,815.70, 1,945,271.10 and 820,518.80

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Solution

The fourth proportional to 1,298,815.70, 1,945,271.10 and 820,518.80 is: 1,228,913.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298,815.70 : 1,945,271.10 = 820,518.80 : x
  2. Step 2: Convert to fraction form
    1,298,815.70/1,945,271.10 = 820,518.80/x
  3. Step 3: Cross multiply
    1,298,815.70x = 1,945,271.10 × 820,518.80
  4. Step 4: Simplify right side
    1,298,815.70x = 1,596,131,508,646.68
  5. Step 5: Solve for x
    x = 1,596,131,508,646.68/1,298,815.70
  6. Step 6: Final answer
    x = 1,228,913.01

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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.