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Finding the Fourth Proportional to 398,396.63, 549,787.35 and 219,548.63

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Solution

The fourth proportional to 398,396.63, 549,787.35 and 219,548.63 is: 302,977.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,396.63 : 549,787.35 = 219,548.63 : x
  2. Step 2: Convert to fraction form
    398,396.63/549,787.35 = 219,548.63/x
  3. Step 3: Cross multiply
    398,396.63x = 549,787.35 × 219,548.63
  4. Step 4: Simplify right side
    398,396.63x = 120,705,056,734.89
  5. Step 5: Solve for x
    x = 120,705,056,734.89/398,396.63
  6. Step 6: Final answer
    x = 302,977.11

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1.5x scale

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.