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Finding the Fourth Proportional to 398,379.55, 549,756.95 and 217,093.05

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Solution

The fourth proportional to 398,379.55, 549,756.95 and 217,093.05 is: 299,584.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,379.55 : 549,756.95 = 217,093.05 : x
  2. Step 2: Convert to fraction form
    398,379.55/549,756.95 = 217,093.05/x
  3. Step 3: Cross multiply
    398,379.55x = 549,756.95 × 217,093.05
  4. Step 4: Simplify right side
    398,379.55x = 119,348,409,199.95
  5. Step 5: Solve for x
    x = 119,348,409,199.95/398,379.55
  6. Step 6: Final answer
    x = 299,584.68

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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.