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Finding the Fourth Proportional to 720,178.44, 993,856.67 and 397,895.95

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Solution

The fourth proportional to 720,178.44, 993,856.67 and 397,895.95 is: 549,102.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,178.44 : 993,856.67 = 397,895.95 : x
  2. Step 2: Convert to fraction form
    720,178.44/993,856.67 = 397,895.95/x
  3. Step 3: Cross multiply
    720,178.44x = 993,856.67 × 397,895.95
  4. Step 4: Simplify right side
    720,178.44x = 395,451,543,873.49
  5. Step 5: Solve for x
    x = 395,451,543,873.49/720,178.44
  6. Step 6: Final answer
    x = 549,102.17

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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.