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Finding the Fourth Proportional to 720,162.42, 993,834.56 and 397,879.95

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Solution

The fourth proportional to 720,162.42, 993,834.56 and 397,879.95 is: 549,080.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,162.42 : 993,834.56 = 397,879.95 : x
  2. Step 2: Convert to fraction form
    720,162.42/993,834.56 = 397,879.95/x
  3. Step 3: Cross multiply
    720,162.42x = 993,834.56 × 397,879.95
  4. Step 4: Simplify right side
    720,162.42x = 395,426,845,041.07
  5. Step 5: Solve for x
    x = 395,426,845,041.07/720,162.42
  6. Step 6: Final answer
    x = 549,080.09

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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.