Home / 1,005,087.35-1,387,343.78-643,485.13

Finding the Fourth Proportional to 1,005,087.35, 1,387,343.78 and 643,485.13

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Solution

The fourth proportional to 1,005,087.35, 1,387,343.78 and 643,485.13 is: 888,216.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005,087.35 : 1,387,343.78 = 643,485.13 : x
  2. Step 2: Convert to fraction form
    1,005,087.35/1,387,343.78 = 643,485.13/x
  3. Step 3: Cross multiply
    1,005,087.35x = 1,387,343.78 × 643,485.13
  4. Step 4: Simplify right side
    1,005,087.35x = 892,735,082,473.85
  5. Step 5: Solve for x
    x = 892,735,082,473.85/1,005,087.35
  6. Step 6: Final answer
    x = 888,216.41

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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.