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Finding the Fourth Proportional to 663,866.80, 994,612.20 and 403,730.80

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Solution

The fourth proportional to 663,866.80, 994,612.20 and 403,730.80 is: 604,873.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,866.80 : 994,612.20 = 403,730.80 : x
  2. Step 2: Convert to fraction form
    663,866.80/994,612.20 = 403,730.80/x
  3. Step 3: Cross multiply
    663,866.80x = 994,612.20 × 403,730.80
  4. Step 4: Simplify right side
    663,866.80x = 401,555,579,195.76
  5. Step 5: Solve for x
    x = 401,555,579,195.76/663,866.80
  6. Step 6: Final answer
    x = 604,873.72

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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.