Home / 828,377.20-1,243,488.16-428,910.72

Finding the Fourth Proportional to 828,377.20, 1,243,488.16 and 428,910.72

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Solution

The fourth proportional to 828,377.20, 1,243,488.16 and 428,910.72 is: 643,843.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,377.20 : 1,243,488.16 = 428,910.72 : x
  2. Step 2: Convert to fraction form
    828,377.20/1,243,488.16 = 428,910.72/x
  3. Step 3: Cross multiply
    828,377.20x = 1,243,488.16 × 428,910.72
  4. Step 4: Simplify right side
    828,377.20x = 533,345,402,017.08
  5. Step 5: Solve for x
    x = 533,345,402,017.08/828,377.20
  6. Step 6: Final answer
    x = 643,843.65

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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.