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Finding the Fourth Proportional to 720,231.58, 993,892.74 and 397,934.78

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Solution

The fourth proportional to 720,231.58, 993,892.74 and 397,934.78 is: 549,135.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,231.58 : 993,892.74 = 397,934.78 : x
  2. Step 2: Convert to fraction form
    720,231.58/993,892.74 = 397,934.78/x
  3. Step 3: Cross multiply
    720,231.58x = 993,892.74 × 397,934.78
  4. Step 4: Simplify right side
    720,231.58x = 395,504,488,835.50
  5. Step 5: Solve for x
    x = 395,504,488,835.50/720,231.58
  6. Step 6: Final answer
    x = 549,135.17

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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.