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Finding the Fourth Proportional to 398,398.86, 549,770.83 and 217,110.24

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Solution

The fourth proportional to 398,398.86, 549,770.83 and 217,110.24 is: 299,601.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,398.86 : 549,770.83 = 217,110.24 : x
  2. Step 2: Convert to fraction form
    398,398.86/549,770.83 = 217,110.24/x
  3. Step 3: Cross multiply
    398,398.86x = 549,770.83 × 217,110.24
  4. Step 4: Simplify right side
    398,398.86x = 119,360,876,846.30
  5. Step 5: Solve for x
    x = 119,360,876,846.30/398,398.86
  6. Step 6: Final answer
    x = 299,601.45

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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.