Home / 687,375.45-1,031,466.38-287,985.69

Finding the Fourth Proportional to 687,375.45, 1,031,466.38 and 287,985.69

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Solution

The fourth proportional to 687,375.45, 1,031,466.38 and 287,985.69 is: 432,147.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,375.45 : 1,031,466.38 = 287,985.69 : x
  2. Step 2: Convert to fraction form
    687,375.45/1,031,466.38 = 287,985.69/x
  3. Step 3: Cross multiply
    687,375.45x = 1,031,466.38 × 287,985.69
  4. Step 4: Simplify right side
    687,375.45x = 297,047,555,716.17
  5. Step 5: Solve for x
    x = 297,047,555,716.17/687,375.45
  6. Step 6: Final answer
    x = 432,147.46

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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.