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Finding the Fourth Proportional to 398,163.50, 549,465.66 and 219,315.50

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Solution

The fourth proportional to 398,163.50, 549,465.66 and 219,315.50 is: 302,655.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,163.50 : 549,465.66 = 219,315.50 : x
  2. Step 2: Convert to fraction form
    398,163.50/549,465.66 = 219,315.50/x
  3. Step 3: Cross multiply
    398,163.50x = 549,465.66 × 219,315.50
  4. Step 4: Simplify right side
    398,163.50x = 120,506,335,955.73
  5. Step 5: Solve for x
    x = 120,506,335,955.73/398,163.50
  6. Step 6: Final answer
    x = 302,655.41

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