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Finding the Fourth Proportional to 663,738.21, 915,957.03 and 361,932.21

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Solution

The fourth proportional to 663,738.21, 915,957.03 and 361,932.21 is: 499,465.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,738.21 : 915,957.03 = 361,932.21 : x
  2. Step 2: Convert to fraction form
    663,738.21/915,957.03 = 361,932.21/x
  3. Step 3: Cross multiply
    663,738.21x = 915,957.03 × 361,932.21
  4. Step 4: Simplify right side
    663,738.21x = 331,514,352,132.94
  5. Step 5: Solve for x
    x = 331,514,352,132.94/663,738.21
  6. Step 6: Final answer
    x = 499,465.52

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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.