Home / 687,218.88-1,029,776.13-287,642.10

Finding the Fourth Proportional to 687,218.88, 1,029,776.13 and 287,642.10

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Solution

The fourth proportional to 687,218.88, 1,029,776.13 and 287,642.10 is: 431,022.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,218.88 : 1,029,776.13 = 287,642.10 : x
  2. Step 2: Convert to fraction form
    687,218.88/1,029,776.13 = 287,642.10/x
  3. Step 3: Cross multiply
    687,218.88x = 1,029,776.13 × 287,642.10
  4. Step 4: Simplify right side
    687,218.88x = 296,206,968,563.07
  5. Step 5: Solve for x
    x = 296,206,968,563.07/687,218.88
  6. Step 6: Final answer
    x = 431,022.75

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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.