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Finding the Fourth Proportional to 398,209.52, 549,528.90 and 219,361.52

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Solution

The fourth proportional to 398,209.52, 549,528.90 and 219,361.52 is: 302,718.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,209.52 : 549,528.90 = 219,361.52 : x
  2. Step 2: Convert to fraction form
    398,209.52/549,528.90 = 219,361.52/x
  3. Step 3: Cross multiply
    398,209.52x = 549,528.90 × 219,361.52
  4. Step 4: Simplify right side
    398,209.52x = 120,545,494,787.93
  5. Step 5: Solve for x
    x = 120,545,494,787.93/398,209.52
  6. Step 6: Final answer
    x = 302,718.77

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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.