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Finding the Fourth Proportional to 398,519.60, 549,940.44 and 217,227.56

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Solution

The fourth proportional to 398,519.60, 549,940.44 and 217,227.56 is: 299,764.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,519.60 : 549,940.44 = 217,227.56 : x
  2. Step 2: Convert to fraction form
    398,519.60/549,940.44 = 217,227.56/x
  3. Step 3: Cross multiply
    398,519.60x = 549,940.44 × 217,227.56
  4. Step 4: Simplify right side
    398,519.60x = 119,462,219,926.53
  5. Step 5: Solve for x
    x = 119,462,219,926.53/398,519.60
  6. Step 6: Final answer
    x = 299,764.98

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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.