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Finding the Fourth Proportional to 398,404.02, 549,781.48 and 217,112.04

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Solution

The fourth proportional to 398,404.02, 549,781.48 and 217,112.04 is: 299,605.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,404.02 : 549,781.48 = 217,112.04 : x
  2. Step 2: Convert to fraction form
    398,404.02/549,781.48 = 217,112.04/x
  3. Step 3: Cross multiply
    398,404.02x = 549,781.48 × 217,112.04
  4. Step 4: Simplify right side
    398,404.02x = 119,364,178,677.02
  5. Step 5: Solve for x
    x = 119,364,178,677.02/398,404.02
  6. Step 6: Final answer
    x = 299,605.86

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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.