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Finding the Fourth Proportional to 715,492.97, 987,418.13 and 405,455.73

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Solution

The fourth proportional to 715,492.97, 987,418.13 and 405,455.73 is: 559,550.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,492.97 : 987,418.13 = 405,455.73 : x
  2. Step 2: Convert to fraction form
    715,492.97/987,418.13 = 405,455.73/x
  3. Step 3: Cross multiply
    715,492.97x = 987,418.13 × 405,455.73
  4. Step 4: Simplify right side
    715,492.97x = 400,354,338,714.39
  5. Step 5: Solve for x
    x = 400,354,338,714.39/715,492.97
  6. Step 6: Final answer
    x = 559,550.35

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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.