Home / 1,388,621.03-1,915,525.13-807,778.80

Finding the Fourth Proportional to 1,388,621.03, 1,915,525.13 and 807,778.80

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Solution

The fourth proportional to 1,388,621.03, 1,915,525.13 and 807,778.80 is: 1,114,285.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,621.03 : 1,915,525.13 = 807,778.80 : x
  2. Step 2: Convert to fraction form
    1,388,621.03/1,915,525.13 = 807,778.80/x
  3. Step 3: Cross multiply
    1,388,621.03x = 1,915,525.13 × 807,778.80
  4. Step 4: Simplify right side
    1,388,621.03x = 1,547,320,586,842.35
  5. Step 5: Solve for x
    x = 1,547,320,586,842.35/1,388,621.03
  6. Step 6: Final answer
    x = 1,114,285.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.