Home / 1,005,087.88-1,387,344.51-643,485.65

Finding the Fourth Proportional to 1,005,087.88, 1,387,344.51 and 643,485.65

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Solution

The fourth proportional to 1,005,087.88, 1,387,344.51 and 643,485.65 is: 888,217.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005,087.88 : 1,387,344.51 = 643,485.65 : x
  2. Step 2: Convert to fraction form
    1,005,087.88/1,387,344.51 = 643,485.65/x
  3. Step 3: Cross multiply
    1,005,087.88x = 1,387,344.51 × 643,485.65
  4. Step 4: Simplify right side
    1,005,087.88x = 892,736,280,573.85
  5. Step 5: Solve for x
    x = 892,736,280,573.85/1,005,087.88
  6. Step 6: Final answer
    x = 888,217.14

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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.