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Finding the Fourth Proportional to 398,528.83, 549,958.78 and 217,244.28

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Solution

The fourth proportional to 398,528.83, 549,958.78 and 217,244.28 is: 299,791.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,528.83 : 549,958.78 = 217,244.28 : x
  2. Step 2: Convert to fraction form
    398,528.83/549,958.78 = 217,244.28/x
  3. Step 3: Cross multiply
    398,528.83x = 549,958.78 × 217,244.28
  4. Step 4: Simplify right side
    398,528.83x = 119,475,399,190.78
  5. Step 5: Solve for x
    x = 119,475,399,190.78/398,528.83
  6. Step 6: Final answer
    x = 299,791.11

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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.