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Finding the Fourth Proportional to 663,006.78, 914,948.73 and 361,200.78

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Solution

The fourth proportional to 663,006.78, 914,948.73 and 361,200.78 is: 498,456.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,006.78 : 914,948.73 = 361,200.78 : x
  2. Step 2: Convert to fraction form
    663,006.78/914,948.73 = 361,200.78/x
  3. Step 3: Cross multiply
    663,006.78x = 914,948.73 × 361,200.78
  4. Step 4: Simplify right side
    663,006.78x = 330,480,194,936.01
  5. Step 5: Solve for x
    x = 330,480,194,936.01/663,006.78
  6. Step 6: Final answer
    x = 498,456.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.