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Finding the Fourth Proportional to 398,412.82, 549,809.70 and 219,564.82

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Solution

The fourth proportional to 398,412.82, 549,809.70 and 219,564.82 is: 302,999.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,412.82 : 549,809.70 = 219,564.82 : x
  2. Step 2: Convert to fraction form
    398,412.82/549,809.70 = 219,564.82/x
  3. Step 3: Cross multiply
    398,412.82x = 549,809.70 × 219,564.82
  4. Step 4: Simplify right side
    398,412.82x = 120,718,867,814.75
  5. Step 5: Solve for x
    x = 120,718,867,814.75/398,412.82
  6. Step 6: Final answer
    x = 302,999.46

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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.