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Finding the Fourth Proportional to 279,168.12, 385,217.04 and 188,720.88

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Solution

The fourth proportional to 279,168.12, 385,217.04 and 188,720.88 is: 260,411.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,168.12 : 385,217.04 = 188,720.88 : x
  2. Step 2: Convert to fraction form
    279,168.12/385,217.04 = 188,720.88/x
  3. Step 3: Cross multiply
    279,168.12x = 385,217.04 × 188,720.88
  4. Step 4: Simplify right side
    279,168.12x = 72,698,498,779.80
  5. Step 5: Solve for x
    x = 72,698,498,779.80/279,168.12
  6. Step 6: Final answer
    x = 260,411.18

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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.