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Finding the Fourth Proportional to 331,345.40, 497,018.10 and 278,857.40

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Solution

The fourth proportional to 331,345.40, 497,018.10 and 278,857.40 is: 418,286.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,345.40 : 497,018.10 = 278,857.40 : x
  2. Step 2: Convert to fraction form
    331,345.40/497,018.10 = 278,857.40/x
  3. Step 3: Cross multiply
    331,345.40x = 497,018.10 × 278,857.40
  4. Step 4: Simplify right side
    331,345.40x = 138,597,175,118.94
  5. Step 5: Solve for x
    x = 138,597,175,118.94/331,345.40
  6. Step 6: Final answer
    x = 418,286.10

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1.5x scale

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.