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Finding the Fourth Proportional to 720,037.44, 993,712.32 and 418,212

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Solution

The fourth proportional to 720,037.44, 993,712.32 and 418,212 is: 577,167.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,037.44 : 993,712.32 = 418,212 : x
  2. Step 2: Convert to fraction form
    720,037.44/993,712.32 = 418,212/x
  3. Step 3: Cross multiply
    720,037.44x = 993,712.32 × 418,212
  4. Step 4: Simplify right side
    720,037.44x = 415,582,416,771.84
  5. Step 5: Solve for x
    x = 415,582,416,771.84/720,037.44
  6. Step 6: Final answer
    x = 577,167.79

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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.