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Finding the Fourth Proportional to 397,998.77, 549,230.42 and 216,712.87

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Solution

The fourth proportional to 397,998.77, 549,230.42 and 216,712.87 is: 299,059.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,998.77 : 549,230.42 = 216,712.87 : x
  2. Step 2: Convert to fraction form
    397,998.77/549,230.42 = 216,712.87/x
  3. Step 3: Cross multiply
    397,998.77x = 549,230.42 × 216,712.87
  4. Step 4: Simplify right side
    397,998.77x = 119,025,299,778.21
  5. Step 5: Solve for x
    x = 119,025,299,778.21/397,998.77
  6. Step 6: Final answer
    x = 299,059.47

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Double scale
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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.