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Finding the Fourth Proportional to 398,179.56, 549,487.68 and 219,331.56

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Solution

The fourth proportional to 398,179.56, 549,487.68 and 219,331.56 is: 302,677.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,179.56 : 549,487.68 = 219,331.56 : x
  2. Step 2: Convert to fraction form
    398,179.56/549,487.68 = 219,331.56/x
  3. Step 3: Cross multiply
    398,179.56x = 549,487.68 × 219,331.56
  4. Step 4: Simplify right side
    398,179.56x = 120,519,990,055.18
  5. Step 5: Solve for x
    x = 120,519,990,055.18/398,179.56
  6. Step 6: Final answer
    x = 302,677.49

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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.