Home / 990,834.69-1,485,871.74-421,855.05

Finding the Fourth Proportional to 990,834.69, 1,485,871.74 and 421,855.05

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Solution

The fourth proportional to 990,834.69, 1,485,871.74 and 421,855.05 is: 632,620.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,834.69 : 1,485,871.74 = 421,855.05 : x
  2. Step 2: Convert to fraction form
    990,834.69/1,485,871.74 = 421,855.05/x
  3. Step 3: Cross multiply
    990,834.69x = 1,485,871.74 × 421,855.05
  4. Step 4: Simplify right side
    990,834.69x = 626,822,497,171.29
  5. Step 5: Solve for x
    x = 626,822,497,171.29/990,834.69
  6. Step 6: Final answer
    x = 632,620.66

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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.