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Finding the Fourth Proportional to 398,427.59, 549,814.04 and 217,135.62

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Solution

The fourth proportional to 398,427.59, 549,814.04 and 217,135.62 is: 299,638.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,427.59 : 549,814.04 = 217,135.62 : x
  2. Step 2: Convert to fraction form
    398,427.59/549,814.04 = 217,135.62/x
  3. Step 3: Cross multiply
    398,427.59x = 549,814.04 × 217,135.62
  4. Step 4: Simplify right side
    398,427.59x = 119,384,212,188.69
  5. Step 5: Solve for x
    x = 119,384,212,188.69/398,427.59
  6. Step 6: Final answer
    x = 299,638.41

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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.