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Finding the Fourth Proportional to 398,449.50, 549,894.87 and 219,636.06

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Solution

The fourth proportional to 398,449.50, 549,894.87 and 219,636.06 is: 303,116.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,449.50 : 549,894.87 = 219,636.06 : x
  2. Step 2: Convert to fraction form
    398,449.50/549,894.87 = 219,636.06/x
  3. Step 3: Cross multiply
    398,449.50x = 549,894.87 × 219,636.06
  4. Step 4: Simplify right side
    398,449.50x = 120,776,742,661.01
  5. Step 5: Solve for x
    x = 120,776,742,661.01/398,449.50
  6. Step 6: Final answer
    x = 303,116.81

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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.