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Finding the Fourth Proportional to 663,968.70, 996,989.85 and 384,032.70

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Solution

The fourth proportional to 663,968.70, 996,989.85 and 384,032.70 is: 576,648.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,968.70 : 996,989.85 = 384,032.70 : x
  2. Step 2: Convert to fraction form
    663,968.70/996,989.85 = 384,032.70/x
  3. Step 3: Cross multiply
    663,968.70x = 996,989.85 × 384,032.70
  4. Step 4: Simplify right side
    663,968.70x = 382,876,703,968.10
  5. Step 5: Solve for x
    x = 382,876,703,968.10/663,968.70
  6. Step 6: Final answer
    x = 576,648.72

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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.