Home / 783,739.72-1,175,942.44-428,338.52

Finding the Fourth Proportional to 783,739.72, 1,175,942.44 and 428,338.52

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Solution

The fourth proportional to 783,739.72, 1,175,942.44 and 428,338.52 is: 642,689.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,739.72 : 1,175,942.44 = 428,338.52 : x
  2. Step 2: Convert to fraction form
    783,739.72/1,175,942.44 = 428,338.52/x
  3. Step 3: Cross multiply
    783,739.72x = 1,175,942.44 × 428,338.52
  4. Step 4: Simplify right side
    783,739.72x = 503,701,444,354.79
  5. Step 5: Solve for x
    x = 503,701,444,354.79/783,739.72
  6. Step 6: Final answer
    x = 642,689.70

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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.